Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
lam tuc » lam thuoc, lam truoc, luat tuc
dai hoa » dai khoa, dai hoc, dai hoi
va hanh » van hanh, va thanh, va danh
van lam » van nam
nang xa » nang x, lang xa, nang ma
tuc va » thuc va, truc va, tuc xa
va hoa » van hoa, va hoc, ma hoa

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) or (thuat san)) ky nang xa hoi. hieu van lam tuc va hanh ((dai hoa) or (va hoa)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuat san)) ky nang xa hoi. hieu van lam tuc va hanh ((dai hoa) OR (va hoa)) viet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuat san)) ky nang xa hoi. hieu van lam tuc va hanh ((dai hoa) or (va hoa)) viet*.