Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
nang dai » nang dau, nang tai, lang dai
sach ty » sach tu, sach thu, xach tay
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
va dan » ca dan, va dao, va dau
vi cua » vai cua, di cua
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) nang dai hoc. hieu ve cac xuc ((van hanh) OR (va dan)) vi cua te~.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) nang dai hoc. hieu ve cac xuc ((van hanh) or (va dan)) vi cua te*.