Perhaps you should try some spelling variations:
dam thuc » am thuc, dan thuc, nam thuc
ve triet » va trien, su triet
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
te sac » te cac, te san
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: ((te sac) OR (te sach)) ky nang xa hoi. hieu ve ((dam thuc) or (cam xuc)) va hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky nang xa hoi. hieu ve ((dam thuc) OR (cam xuc)) va hanh vi ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te sach)) ky nang xa hoi. hieu ve ((dam thuc) or (cam xuc)) va hanh vi ve triet".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te sach)) ky nang xa hoi. hieu ve ((dam thuc) or (cam xuc)) va hanh vi ve triet*.