Perhaps you should try some spelling variations:
phu san » phi san, thuy san
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu van
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tuc » cua duc, cua thuoc, luat tuc
san ky » sang ky, van ky, dan ky
cua tu » cua su, cua cu, cua te

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

• Performing a fuzzy search may retrieve terms with similar spellings: phu san ky lang xa hoi. ((hieu ve) OR (hieu va)) cac duc va hanh di ((cua tu) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: phu san ky lang xa hoi. ((hieu ve) OR (hieu va)) cac duc va hanh di ((cua tu) OR (cua tuc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "phu san ky lang xa hoi. ((hieu ve) OR (hieu va)) cac duc va hanh di ((cua tu) or (cua tuc))".
• Adding a wildcard symbol may retrieve word variants: phu san ky lang xa hoi. ((hieu ve) OR (hieu va)) cac duc va hanh di ((cua tu) or (cua tuc))*.