Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
dang xay » dang van, van xay
hanh va » hang va
vien da » vien dai, hien dai
sach lo » sach dao, sach doi, sach hoi
te sach » toc sach
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, cua triet
da tuc » dao tuc, va tuc, da tac
tuc va » thuc va, truc va, tuc xa

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 lo ((lang xa) or (dang xay)) hoi. hieu vien da tuc va ((hanh vi) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach lo ((lang xa) OR (dang xay)) hoi. hieu vien da tuc va ((hanh vi) OR (hanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach lo ((lang xa) or (dang xay)) hoi. hieu vien da tuc va ((hanh vi) or (hanh va)) cua tre*.