Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac
xang cao » nang cao, lang cao, quang cao
cua cau » cua cac, cua cay, cua can
van anh » van thanh, tuan anh, van minh
luc van » luoc van, luu van, duc van
cac luc » cau luc, coc luc, cac nuoc
cua chu » sua chua
hieu ve » hieu va, hieu van
cao hoc » co hoc, cho hoc, chat hoc
hoc anh » hoc nganh, hoc nhanh, ngoc anh
anh vi » hanh vi, anh va, anh ve
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) OR (hoc anh)) ty xang cao hoc. hieu ve cac luc van anh vi ((cua cau) or (cua chu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc anh)) ty xang cao hoc. hieu ve cac luc van anh vi ((cua cau) OR (cua chu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc anh)) ty xang cao hoc. hieu ve cac luc van anh vi ((cua cau) or (cua chu))*".