Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
dua tren » dung tren
chat xuc » chat huu, cam xuc, chao xu
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
cao hoc » co hoc, cho hoc, chat hoc
va dau » va dao
cua te » cua tu

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 ky nang cao hoc. hieu ve chat xuc ((va hanh) or (va dau)) dau ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky nang cao hoc. hieu ve chat xuc ((va hanh) OR (va dau)) dau ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang cao hoc. hieu ve chat xuc ((va hanh) or (va dau)) dau ((dua tren) or (cua te))*.