Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
tu truc » tu thuoc, tu trung
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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 thu nang xa hoi. hieu va ((tu truc) or (cau truc)) van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu nang xa hoi. hieu va ((tu truc) OR (cau truc)) van hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach thu nang xa hoi. hieu va ((tu truc) or (cau truc)) van hanh vai cua tre*.