Perhaps you should try some spelling variations:
trong dang » truong dang, trong dan, trong dong
dang toan » dang tran, dan toan, dung toan
khi tinh » khoi tinh, thi tinh, khien tinh
khi sinh » ki sinh, thi sinh, khoe sinh
kho tinh » khoa tinh, khoi tinh, tho tinh
tranh va » tranh van, trang va, trinh va
toan cao » toan ban, toan tap
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((((khi tinh) OR (khi sinh))) or (kho tinh)) - canh tranh va dung trong dang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((((khi tinh) OR (khi sinh))) OR (kho tinh)) - canh tranh va dung trong dang toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((((khi tinh) OR (khi sinh))) or (kho tinh)) - canh tranh va dung trong dang toan cao".
• Adding a wildcard symbol may retrieve word variants: doi ((((khi tinh) OR (khi sinh))) or (kho tinh)) - canh tranh va dung trong dang toan cao*.