Perhaps you should try some spelling variations:
hanh vai » hanh va, hanh tai, hanh van
cham luc » cham soc, nhan luc, cham cuu
tang van » dang van, hoang van, trong van
te sach » toc sach
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((nang xa) or (tang van)) hoi. hieu vu cham luc va ((hanh vai) OR (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (tang van)) hoi. hieu vu cham luc va ((hanh vai) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang xa) or (tang van)) hoi. hieu vu cham luc va ((hanh vai) OR (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (tang van)) hoi. hieu vu cham luc va ((hanh vai) OR (hanh vi)) cua tre*.