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