Perhaps you should try some spelling variations:
ban thanh » ban hang
thu nang » thi nang, thu hang, thu bang
ban hanh » ban hang
cham duc » pham duc, cham soc, phan duc
sach thu » sach thue, sach thieu, sach tham
pham duy » pham duc
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma

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 thu nang xa hoi. hieu va ((cham duc) OR (pham duy)) ((ban thanh) or (ban hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu nang xa hoi. hieu va ((cham duc) OR (pham duy)) ((ban thanh) OR (ban hanh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu nang xa hoi. hieu va ((cham duc) OR (pham duy)) ((ban thanh) or (ban hanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach thu nang xa hoi. hieu va ((cham duc) OR (pham duy)) ((ban thanh) or (ban hanh)) vai cua tre*.