Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hieu sach » chieu sach, hieu cach, dien sach
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
hanh tam » thanh tam, nhanh tam, hanh tram
tam tuan » tam than, ta tuan, tai tuan
dan toan » van toan, dan than, manh 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: doc hieu sach - hanh tam tuan ((nhung cong) OR (dung cong)) dan toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu sach - hanh tam tuan ((nhung cong) OR (dung cong)) dan toan ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - hanh tam tuan ((nhung cong) OR (dung cong)) dan toan ban*.