Perhaps you should try some spelling variations:
chieu ke » hieu ky, hieu ve, hieu kem
chau phi » chi phi, chau tho
va hanh » van hanh, va thanh, va danh
hieu ke » hieu kem, hieu ky, hieu ve
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
bach y » sach y
ve ve » de ve, ke ve, ve ke
va ve » va de, va le, va vi

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 nang xa hoi. ((hieu ke) or (chieu ke)) chau phi va hanh ((ve ve) OR (va ve)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach y nang xa hoi. ((hieu ke) OR (chieu ke)) chau phi va hanh ((ve ve) OR (va ve)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach y nang xa hoi. ((hieu ke) or (chieu ke)) chau phi va hanh ((ve ve) OR (va ve)) triet".
• Adding a wildcard symbol may retrieve word variants: vu bach y nang xa hoi. ((hieu ke) or (chieu ke)) chau phi va hanh ((ve ve) OR (va ve)) triet*.