Perhaps you should try some spelling variations:
thi nang » thi cong, ki nang, thi hanh
thi hang » thi hanh, thi hong, thi thanh
hanh loc » thanh loi, hanh duoc, nhanh doc
su sach » so sach
doi cua » dai cua, hoi cua
dan doi » dan hoi, dan toi, van doi
cua tre » cua te, cuu tre, cua triet
thi van » thi lan, thi hanh
hang xa » hoang xa, hang va, hang ca
vu sach » vu bach, vu khach
loc va » hoc va, luc va
va dan » ca dan, va dao, va dau

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) or (vu sach)) thi hang xa hoi. ((thi van) or (thi nang)) hanh loc va dan doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) thi hang xa hoi. ((thi van) OR (thi nang)) hanh loc va dan doi cua tre*.