Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
nhung cong » dung cong, thong cong, hang cong
trinh phan » trinh han, trinh quan, thanh phan
thanh tra » thanh toan, thanh hoa
dang cong » dung cong
tra quan » tri quan, tran quang, toan quan
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sach - thanh tra quan ((nhung cong) or (dang cong)) trinh phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - thanh tra quan ((nhung cong) OR (dang cong)) trinh phan dau.
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - thanh tra quan ((nhung cong) or (dang cong)) trinh phan dau*.