Perhaps you should try some spelling variations:
thanh tung » thanh cong
kieu tinh » trieu tinh, diep tinh, bien tinh
lieu tinh » trieu tinh, diep tinh, bien tinh
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((kieu tinh) or (lieu tinh)) - ((canh tranh) or (thanh tung)) su dung cong tan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((kieu tinh) OR (lieu tinh)) - ((canh tranh) OR (thanh tung)) su dung cong tan phan dau.
• Adding a wildcard symbol may retrieve word variants: ho ((kieu tinh) or (lieu tinh)) - ((canh tranh) or (thanh tung)) su dung cong tan phan dau*.