Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
thanh thong » thanh thuong, thanh hong, thanh chuong
hieu tinh » chieu tinh, lieu tinh, kieu tinh
tong cong » trong cong, cong cong, dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
va tong » va thong, va tuong, va trong

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 tinh - ((thanh thong) OR (thanh thang)) va tong cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu tinh - ((thanh thong) OR (thanh thang)) va tong cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - ((thanh thong) OR (thanh thang)) va tong cong dan toan cao*.