Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
trong dang » truong dang, trong dan, trong dong
tranh cac » trinh cac, thanh cac, tranh cai
cac trong » cac truong, cay trong, tac trong
dang tinh » dang dinh, dang sinh, dang vinh
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (toc thieu)) sang - canh tranh cac trong dang tinh ((toan cau) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (toc thieu)) sang - canh tranh cac trong dang tinh ((toan cau) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (toc thieu)) sang - canh tranh cac trong dang tinh ((toan cau) OR (toan tap))*.