Perhaps you should try some spelling variations:
thep thiet » thep viet, thuyet thiet
thep tieu » theo tieu, thep viet, he tieu
dung cong » dung trong
anh tang » anh bang, anh dang, anh nang
qua dung » quang dung, su dung, qua song
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: ((thep tieu) OR (thep thiet)) tinh - ((anh tang) or (canh tranh)) qua dung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thep tieu) OR (thep thiet)) tinh - ((anh tang) OR (canh tranh)) qua dung cong dan toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thep tieu) OR (thep thiet)) tinh - ((anh tang) or (canh tranh)) qua dung cong dan toan cao*".