Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van tuan » van quan, van ban, anh tuan
hanh lai » hanh lam, hanh tai, thanh loi
tuan du » toan du, xuan du, tuan cu
sach ky » sac ky, sach y, sach ty
cao hoi » co hoi, cao hoc, tao hoi
cua tre » cua te, cuu tre, cua triet
du va » dau va, tu va, su va

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 ky nang ((cao hoi) or (cau hoi)). hieu van tuan du va ((hanh lai) or (thanh lap)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ((cao hoi) OR (cau hoi)). hieu van tuan du va ((hanh lai) OR (thanh lap)) cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ((cao hoi) or (cau hoi)). hieu van tuan du va ((hanh lai) or (thanh lap)) cua tre*.