Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hoc sach » hoc sinh, hoc cac, hoc anh
thanh vi » hanh vi, thanh va, thanh ve
hieu van » thien van, lieu va, hieu ve
cho hoc » co hoc, khoa hoc
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
cao hoc » co hoc, chat hoc
ty nang » ky nang, ty xang, ty hang
cua cau » cua cac, cua chu, cua cay
vi cua » vai cua, di cua

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 ty nang ((cao hoc) or (cho hoc)). ((hieu van) or (hieu va)) cac xuc van thanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty nang ((cao hoc) OR (cho hoc)). ((hieu van) OR (hieu va)) cac xuc van thanh vi cua cau*.