Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
hieu ve » hieu van
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
sinh y » sinh ly
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh y nang xa hoi. ((hieu va) or (hieu ve)) cam ((tuc va) or (duc va)) hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh y nang xa hoi. ((hieu va) OR (hieu ve)) cam ((tuc va) OR (duc va)) hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sinh y nang xa hoi. ((hieu va) or (hieu ve)) cam ((tuc va) or (duc va)) hanh va cua tre*.