Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
nang cho » nang chon, ngang cho, nang cao
thanh vi » hanh vi, thanh va, thanh ve
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cua cau » cua cac, cua chu, cua cay
cac xuc » chat xuc, cac cuoc, cac quoc
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa 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 thu nang cho hoc. hieu ve ((((cac xuc) OR (cac nuoc))) or (cam xuc)) van thanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thu nang cho hoc. hieu ve ((((cac xuc) OR (cac nuoc))) OR (cam xuc)) van thanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach thu nang cho hoc. hieu ve ((((cac xuc) OR (cac nuoc))) or (cam xuc)) van thanh vi cua cau*".