Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
van hanh » van thanh, ban hanh, van anh
sang lai » sang tai, sang lap, mang lai
cham xuc » cam xuc, chat xuc, cham soc
hieu vu » hieu va, hieu su, dieu vu
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
lai hoi » dai hoi, lai hoa, lai roi
san ky » sang ky, van ky, ban ky
dan ky » van ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((san ky) or (dan ky)) sang lai hoi. ((hieu vu) OR (hieu ve)) cham xuc van hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((san ky) OR (dan ky)) sang lai hoi. ((hieu vu) OR (hieu ve)) cham xuc van hanh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((san ky) or (dan ky)) sang lai hoi. ((hieu vu) OR (hieu ve)) cham xuc van hanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((san ky) or (dan ky)) sang lai hoi. ((hieu vu) OR (hieu ve)) cham xuc van hanh dai cua te*.