Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thien van » thi van
luoc van » luoc can, luoc va, luc van
toc sach » hoc sach, doc sach, thuoc sach
cao hoc » co hoc, cho hoc, chat hoc
duc van » duc va, duc tan, duc manh
cao hoi » cau hoi, co hoi, tao hoi
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
anh vi » hanh vi, anh va, anh ve
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 y nang ((cao hoi) or (cao hoc)). thien van thanh ((duc van) or (luoc van)) anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ((cao hoi) OR (cao hoc)). thien van thanh ((duc van) OR (luoc van)) anh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ((cao hoi) or (cao hoc)). thien van thanh ((duc van) or (luoc van)) anh vi cua tre*.