Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
vu khach » vu khac, vay khach, cua khach
hieu van » hieu va, thien van, lieu va
hanh lai » hanh lam, hanh tai, thanh lap
vu khanh » vu thanh, van khanh, duy khanh
thu nang » thi nang, thu hang, thu bang
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
lai cua » dai cua, hai cua, lai chau
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu khach) or (vu khanh)) thu nang xa hoi. ((hieu ve) OR (hieu van)) pham thuc va hanh lai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (vu khanh)) thu nang xa hoi. ((hieu ve) OR (hieu van)) pham thuc va hanh lai cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu khach) or (vu khanh)) thu nang xa hoi. ((hieu ve) OR (hieu van)) pham thuc va hanh lai cua vat".
• Adding a wildcard symbol may retrieve word variants: ((vu khach) or (vu khanh)) thu nang xa hoi. ((hieu ve) OR (hieu van)) pham thuc va hanh lai cua vat*.