Perhaps you should try some spelling variations:
chiet tach » chieu sach
truong hai » truong dai, truong tai, truong ham
doi chiet » doi chieu, doi chi, doi viet
trong hai » trong thai, trong tai, trong hoat
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - thanh ((truong hai) or (trong hai)) bang ((cong tan) OR (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - thanh ((truong hai) OR (trong hai)) bang ((cong tan) OR (cong tac)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chiet tach - thanh ((truong hai) or (trong hai)) bang ((cong tan) OR (cong tac)) toan cau".
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - thanh ((truong hai) or (trong hai)) bang ((cong tan) OR (cong tac)) toan cau*.