Perhaps you should try some spelling variations:
thien van » thi van
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
phuc va » phuc vu, thuc va, thuc vat
chuc va » thuc va, thuc vat
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: tu sach thu nang xa hoi. thien van cau ((phuc va) or (chuc va)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu nang xa hoi. thien van cau ((phuc va) OR (chuc va)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach thu nang xa hoi. thien van cau ((phuc va) or (chuc va)) hanh vai cua tre*.