Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
canh tinh » hanh tinh, manh tinh, canh tranh
yen tinh » tuyen tinh
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan
tinh va » tich va, trinh van, trinh vat
ho yen » o yen, chao yen, hong yen

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho yen tinh - canh tinh va nhung cong ((van toan) or (van tuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho yen tinh - canh tinh va nhung cong ((van toan) OR (van tuan)) cao.
• Adding a wildcard symbol may retrieve word variants: ho yen tinh - canh tinh va nhung cong ((van toan) or (van tuan)) cao*.