Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu tinh » trieu tinh, chau tinh, kieu tinh
lieu tinh » trieu tinh, diep tinh, bien tinh
kha nang » phap nang, ky nang, ki nang
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap
ha nang » hoa nang, da nang, ha tang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu tinh) OR (lieu tinh)) - thanh trung ((ha nang) OR (kha nang)) cong tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu tinh) OR (lieu tinh)) - thanh trung ((ha nang) or (kha nang)) cong tac toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu tinh) OR (lieu tinh)) - thanh trung ((ha nang) or (kha nang)) cong tac toan cao*.