Perhaps you should try some spelling variations:
thien van » thi van
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
chau tre » chay tren, chau tho, cho tre
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. ((hieu ve) or (thien van)) cac xuc ((van hanh) or (ban hanh)) lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((hieu ve) OR (thien van)) cac xuc ((van hanh) OR (ban hanh)) lai chau tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((hieu ve) or (thien van)) cac xuc ((van hanh) or (ban hanh)) lai chau tre*.