Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
doi trieu » dong trieu, doi chieu, doi trinh
trung hoc » trung quoc
hoc nhung » hoa nhung, hon nhung, nuoc nhung
cong san » cong tac
toan tai » toan tap, doanh tai, toan ban
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 trieu tinh - thanh trung hoc nhung cong san ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi trieu tinh - thanh trung hoc nhung cong san ((toan tai) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doi trieu tinh - thanh trung hoc nhung cong san ((toan tai) or (toan cao))*.