Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien van » thi van
lam duoc » nam duoc, luat duoc, lam thuoc
ban hanh » ban hang
hieu van » hieu va, lieu va, hieu ve
hanh va » hang va, hanh vi
lam duc » pham duc, nam duoc, lam dung
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
va cua » va chua, via cua, ca cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach v nang xa hoi. ((hieu van) or (thien van)) ((lam duc) OR (lam duoc)) ban hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach v nang xa hoi. ((hieu van) OR (thien van)) ((lam duc) OR (lam duoc)) ban hanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach v nang xa hoi. ((hieu van) or (thien van)) ((lam duc) OR (lam duoc)) ban hanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach v nang xa hoi. ((hieu van) or (thien van)) ((lam duc) OR (lam duoc)) ban hanh va cua tre*.