Perhaps you should try some spelling variations:
cach thuc » anh thuc
va triet » va thiet, va trien, ve triet
ban hanh » ban hang
va hanh » van hanh, va thanh, va danh
cao suc » cao su, cao duc
hieu va » lieu va, hieu qua
cac thu » cac thoi
nang xa » nang x, lang xa, nang ma
va cao » va cac, va co, va dao
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: su ((cac thu) OR (cach thuc)) nang xa hoi. hieu va cao suc ((va hanh) or (ban hanh)) vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((cac thu) OR (cach thuc)) nang xa hoi. hieu va cao suc ((va hanh) OR (ban hanh)) vi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((cac thu) OR (cach thuc)) nang xa hoi. hieu va cao suc ((va hanh) or (ban hanh)) vi va triet".
• Adding a wildcard symbol may retrieve word variants: su ((cac thu) OR (cach thuc)) nang xa hoi. hieu va cao suc ((va hanh) or (ban hanh)) vi va triet*.