Perhaps you should try some spelling variations:
duong cong » dung cong, luong cong, duong trong
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
dang cong » dung cong
van thang » van thanh, van khang, van hang
theo yeu » theo tieu, thiet yeu, theo chu
yeu tinh » yeu tin, lieu tinh, kieu tinh
tinh cua » trinh cua, sinh cua, tinh chat
dan toan » van toan, dan than, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo yeu tinh - hanh tinh cua ((dang cong) or (duong cong)) ((dan toan) or (van thang)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo yeu tinh - hanh tinh cua ((dang cong) OR (duong cong)) ((dan toan) OR (van thang)) cao.
• Adding a wildcard symbol may retrieve word variants: theo yeu tinh - hanh tinh cua ((dang cong) or (duong cong)) ((dan toan) or (van thang)) cao*.