Perhaps you should try some spelling variations:
vanh dai » van dai, vanh tai, lanh dao
van vanh » van anh, van hanh, van manh
xuc van » duc van, luc van, vuc van
sach ty » sach y, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
ve cac » vien cac
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) or (sach tu)) nang xa hoi. hieu ((ve cac) or (va cac)) xuc van vanh dai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach tu)) nang xa hoi. hieu ((ve cac) OR (va cac)) xuc van vanh dai cua su.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach tu)) nang xa hoi. hieu ((ve cac) or (va cac)) xuc van vanh dai cua su*.