Perhaps you should try some spelling variations:
vanh dai » van dai, vanh tai, lanh dao
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
va vanh » va van, va danh, va hanh
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va
sang xa » song xa, lang xa, mang xa
sang ma » tang ma, nang ma, sang tao
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((sang xa) or (sang ma)) hoi. ((hieu ve) or (hieu van)) cam tuc va vanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((sang xa) OR (sang ma)) hoi. ((hieu ve) OR (hieu van)) cam tuc va vanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky ((sang xa) or (sang ma)) hoi. ((hieu ve) or (hieu van)) cam tuc va vanh dai cua tre*.