Perhaps you should try some spelling variations:
nhan thuc » nhan luc, dan thuc, toan thuc
hieu van » thien van, lieu va, hieu ve
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
hoc anh » hoc nganh, hoc nhanh, ngoc anh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vi ve » va ve, gi ve, ve ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (hoc anh)) ky nang xa hoi. ((hieu van) or (hieu va)) nhan thuc va hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (hoc anh)) ky nang xa hoi. ((hieu van) OR (hieu va)) nhan thuc va hanh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (hoc anh)) ky nang xa hoi. ((hieu van) or (hieu va)) nhan thuc va hanh vi ve triet*.