Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
xay danh » vay doanh, xay dung, nam danh
day danh » day manh, dai danh, dao danh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
ban cua » ban quan
cua tre » cua te, cuu tre, cua triet

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 ky nang cao hoi. hieu van nam thuc ((xay danh) or (day danh)) ban cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang cao hoi. hieu van nam thuc ((xay danh) OR (day danh)) ban cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang cao hoi. hieu van nam thuc ((xay danh) or (day danh)) ban cua tre*.