Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
tieu sach » chieu sach, dien sach, te sach
hanh tang » hanh trang, anh tang, hanh mang
tap doan » tap quan
van tuan » van quan, van ban, anh tuan
tang va » trang va, tang van, thang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - hanh tang va ((nhung cong) or (thong cong)) ((tap doan) or (van tuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh tang va ((nhung cong) OR (thong cong)) ((tap doan) OR (van tuan)) cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh tang va ((nhung cong) or (thong cong)) ((tap doan) or (van tuan)) cao*.