Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nham thu, pham thuc
nam thuc » nam thuoc, am thuc, nam thu
va triet » va thiet, va trien, ve 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 ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
vi va » vi van, vai va, vu va

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 ve ((nham thuc) OR (nam thuc)) va hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (hoc anh)) ky nang xa hoi. hieu ve ((nham thuc) OR (nam thuc)) va hanh vi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (hoc anh)) ky nang xa hoi. hieu ve ((nham thuc) OR (nam thuc)) va hanh vi va triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (hoc anh)) ky nang xa hoi. hieu ve ((nham thuc) OR (nam thuc)) va hanh vi va triet*.