Perhaps you should try some spelling variations:
chieu ke » hieu ky, hieu ve, hieu kem
chau phi » chi phi, chau tho
ve triet » va trien, su triet
nang xa » nang x, lang xa, nang ma
hieu ke » hieu kem, hieu ky, hieu ve
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: vu ((bach y) OR (sach y)) nang xa hoi. ((hieu ke) or (chieu ke)) chau phi va hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((bach y) OR (sach y)) nang xa hoi. ((hieu ke) OR (chieu ke)) chau phi va hanh vi ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((bach y) OR (sach y)) nang xa hoi. ((hieu ke) or (chieu ke)) chau phi va hanh vi ve triet".
• Adding a wildcard symbol may retrieve word variants: vu ((bach y) OR (sach y)) nang xa hoi. ((hieu ke) or (chieu ke)) chau phi va hanh vi ve triet*.