Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vu khach » vu khanh, vu khac, vay khach
hanh lai » hanh lam, hanh tai, thanh lap
ban hanh » ban hang
pham duy » pham duc
qua pham » quan pham, quy pham, qua cham
lai cua » dai cua, hai cua, lai chau
duy ban » uy ban, duy van, duy can
vu sach » vu bach, su sach
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa

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) or (lang xa)) hoi. hieu qua pham duy ban hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) y ((nang xa) OR (lang xa)) hoi. hieu qua pham duy ban hanh lai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu khach)) y ((nang xa) or (lang xa)) hoi. hieu qua pham duy ban hanh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu khach)) y ((nang xa) or (lang xa)) hoi. hieu qua pham duy ban hanh lai cua triet*.