Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
chat xuc » chat huu, cam xuc, chao xu
sach tu » sach thu, cach tu, sach ty
cac xuc » cam xuc, cac nuoc, cac cuoc
hieu ve » hieu va, hieu van
cho hoc » khoa hoc
tu hung » tu chung, tu nhung, tu vung
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: toc sach tu hung ((cho hoc) or (co hoc)). hieu ve ((cac xuc) OR (chat xuc)) van thanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu hung ((cho hoc) OR (co hoc)). hieu ve ((cac xuc) OR (chat xuc)) van thanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tu hung ((cho hoc) or (co hoc)). hieu ve ((cac xuc) OR (chat xuc)) van thanh vi cua cau*".