Perhaps you should try some spelling variations:
duoc thien » duc thien, duoc dien, cuoc chien
toc thien » toc thieu, ton thien, thom thien
tranh vat » trinh vat, tranh va, tranh van
dung cong » dung trong
van thanh » ban thanh, van tuan
vat dung » van dung, va dung, viet dung
van toan » van tuan, van tan, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc thien) OR (duoc thien)) nang - canh tranh vat dung cong ((van toan) or (van thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thien) OR (duoc thien)) nang - canh tranh vat dung cong ((van toan) OR (van thanh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc thien) OR (duoc thien)) nang - canh tranh vat dung cong ((van toan) or (van thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: ((toc thien) OR (duoc thien)) nang - canh tranh vat dung cong ((van toan) or (van thanh)) cau*.