Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thong cong » trong cong, thong thong, phong chong
hoc thieu » toc thieu, hoc hien
tong cong » trong cong, cong cong, dung cong
chinh ve » chinh va, chinh vi, chinh ke
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - hanh chinh ve ((thong cong) or (tong cong)) ((dan toan) or (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh chinh ve ((thong cong) OR (tong cong)) ((dan toan) OR (dan than)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh chinh ve ((thong cong) or (tong cong)) ((dan toan) or (dan than)) cao*.