Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
hieu van » thien van, lieu va, hieu ve
ban hanh » ban hang
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 van) or (hieu va)) cac xuc ((gia thanh) or (ban hanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu nang xa hoi. ((hieu van) OR (hieu va)) cac xuc ((gia thanh) OR (ban hanh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach thu nang xa hoi. ((hieu van) or (hieu va)) cac xuc ((gia thanh) or (ban hanh)) vi cua tre*.