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