Perhaps you should try some spelling variations:
thien van » thi van
thanh tri » thanh tra, thanh tai, chinh tri
hanh tri » hanh tai, hanh trinh, hanh triet
sach tu » sach thu, cach tu, sach ty
nang xa » nang x, lang xa, nang ma
van bac » van ban, van bao, van hac
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sach tu) or (sac ky)) nang xa hoi. thien van bac xuc van ((hanh tri) or (thanh tri)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach tu) OR (sac ky)) nang xa hoi. thien van bac xuc van ((hanh tri) OR (thanh tri)) cua tre.
• Adding a wildcard symbol may retrieve word variants: so ((sach tu) or (sac ky)) nang xa hoi. thien van bac xuc van ((hanh tri) or (thanh tri)) cua tre*.