Perhaps you should try some spelling variations:
vanh dai » van dai, vanh tai, lanh dao
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
xac va » tac va, ac va, bac va
tuc va » thuc va, truc va, duc va

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

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