Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh chua » trinh chuan, trinh cua, trinh chu
chua dang » cua dang, chua dong, chua nang
dang cong » dung cong
theo yeu » theo tieu, thiet yeu, theo chu
yeu tinh » yeu tin, lieu tinh, kieu tinh
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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 trinh chua dang cong ((dan toan) or (van toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo yeu tinh - hanh trinh chua dang cong ((dan toan) OR (van toan)) tap.
• Adding a wildcard symbol may retrieve word variants: theo yeu tinh - hanh trinh chua dang cong ((dan toan) or (van toan)) tap*.