Perhaps you should try some spelling variations:
hieu caco » hieu cach, hieu ca, chieu cao
nhan luc » nang luc
hieu cac » hieu luc, hieu va, hieu van
te sach » toc sach
cao cua » ca cua, co cua, cau cua
dao cao » dao tao, bao cao, tao cao
sach uu » sach luu, sach tu, sach xu
cua tre » cua te, cuu tre, cua triet
dang ha » dong ha, dung ha, lang ha
dang xa » dang xay, lang xa, dang va
luc va » duc va, tuc va, loc va
va dao » ca dao

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 uu ((dang xa) OR (dang ha)) hoi. ((hieu caco) or (hieu cac)) nhan luc va dao cao cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach uu ((dang xa) OR (dang ha)) hoi. ((hieu caco) OR (hieu cac)) nhan luc va dao cao cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach uu ((dang xa) OR (dang ha)) hoi. ((hieu caco) or (hieu cac)) nhan luc va dao cao cua tre*".