Perhaps you should try some spelling variations:
nang khoa » hang khoa, dang khoa, nang hoa
khoa hoc » hoa hoc
te cach » te sach, tu cach, te cac
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
tu nang » tru nang, tu nong, tu nano
ve cach » va cach, ve canh
cua cau » cua cac, cua chu, cua cay
ve cac » va cac, vien cac
anh vi » hanh vi, anh va, anh vu
anh ve » hanh ve, anh va, anh viet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te cach) OR (ve cach)) tu nang khoa hoc. hieu ve cac xuc van ((anh vi) or (anh ve)) cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cach) OR (ve cach)) tu nang khoa hoc. hieu ve cac xuc van ((anh vi) OR (anh ve)) cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cach) OR (ve cach)) tu nang khoa hoc. hieu ve cac xuc van ((anh vi) or (anh ve)) cua cau*".