Perhaps you should try some spelling variations:
sinh ky » sinh ly, sinh y, kinh ky
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
xac va » tac va, ac va, bac va
luc va » duc va, tuc va, loc va
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 ky nang xa hoi. ((hieu va) or (hieu ve)) cam ((xac va) or (luc va)) hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ky nang xa hoi. ((hieu va) OR (hieu ve)) cam ((xac va) OR (luc va)) hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sinh ky nang xa hoi. ((hieu va) or (hieu ve)) cam ((xac va) or (luc va)) hanh va cua tre*.