Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
sach thi » sach thu, sach tai, sach thieu
thi hang » thi hanh, thi nang, thi hong
thanh vi » hanh vi, thanh va, thanh ve
chat xuc » chat huu, cam xuc, chao xu
hieu van » hieu va, thien van, lieu va
cac xuc » cam xuc, cac nuoc, cac cuoc
hang ca » hang va, nang cao, hang tai
hieu ve » hieu va
cua cau » cua cac, cua chu, cua cay
ca hoc » cao hoc, cua hoc, cac hoc
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 thi hang ca hoc. ((hieu ve) OR (hieu van)) ((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 thi hang ca hoc. ((hieu ve) OR (hieu van)) ((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 thi hang ca hoc. ((hieu ve) OR (hieu van)) ((cac xuc) or (chat xuc)) van thanh vi cua cau*".