Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
van hanh » van thanh, ban hanh, van anh
thu nang » thi nang, thu bang, tho nang
thu hang » thi hang, thuc hanh, thu huong
cho hoc » co hoc, khoa hoc
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
cua cau » cua chu, cua cay, cua can
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 ((thu nang) or (thu hang)) cho hoc. hieu ve cac xuc van hanh vi ((cua cau) OR (cua cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((thu nang) OR (thu hang)) cho hoc. hieu ve cac xuc van hanh vi ((cua cau) OR (cua cac))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((thu nang) or (thu hang)) cho hoc. hieu ve cac xuc van hanh vi ((cua cau) OR (cua cac))*".