Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh va » thanh van, hanh va, thanh ha
toc sach » hoc sach, doc sach, thuoc sach
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
cua cau » cua cac, cua chu, cua cay
cho hoc » khoa hoc
ty nang » ky nang, ty xang, ty hang
va cua » va chua, via cua, ca cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) ty nang ((cho hoc) or (co hoc)). hieu va cac xuc van thanh va cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty nang ((cho hoc) OR (co hoc)). hieu va cac xuc van thanh va cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ty nang ((cho hoc) or (co hoc)). hieu va cac xuc van thanh va cua cau*".