Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhieu tang » chieu sang, hieu lang, nhiet nang
thong cong » trong cong, thong thong, phong chong
tong cong » trong cong, cong cong, dung cong
chinh ve » chinh va, chinh vi, chinh ke
dan toan » van toan, dan than, manh toan
toan tap » toan 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 ((chiet tach) or (nhieu tang)) - hanh chinh ve ((thong cong) OR (tong cong)) dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chiet tach) OR (nhieu tang)) - hanh chinh ve ((thong cong) OR (tong cong)) dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chiet tach) or (nhieu tang)) - hanh chinh ve ((thong cong) OR (tong cong)) dan toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chiet tach) or (nhieu tang)) - hanh chinh ve ((thong cong) OR (tong cong)) dan toan tap*.