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
tang luan » dung luan
anh tang » anh bang, anh dang, anh nang
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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 - anh tang luan ((nhung cong) OR (thong cong)) tan toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - anh tang luan ((nhung cong) OR (thong cong)) tan toan ban".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - anh tang luan ((nhung cong) OR (thong cong)) tan toan ban*.