Yog tias koj xav tau ntse nrog kawm tshuaj, yuav siv daim tsev kawm thiab ua ib kev sib tham. Tus uas muaj nyob rau hauv txoj kev kawm yuav tsum hlad txog cov keg kawm thiab ib tsug ntawm kev sib tham. Qhov tseem ceeb tshaj plaws yog kom koj tau hais txog txog cov tsav tshuaj thiab yuav muaj ib tsug ntawm kev sib tham. Lub rooj kawm Txav tshuaj n