Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien van » thi van
ban hanh » ban hang
hieu van » hieu va, lieu va, hieu ve
hanh va » hang va, hanh vi
duc ban » duc tan, duc van, dua ban
lam duc » lam duoc, pham duc, nam duoc
vu nang » vuc nang, va nang, vu dang
v nang » va nang, van nang, voi nang
va cua » va chua, via cua, ca cua
cua te » cua tu

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