Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trung cap » truong cao, trung tam
trung hoc » trung quoc
chi sang » chi lang, chieu sang, chi chang
cong san » cong tac
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sang - thanh ((trung cap) or (trung hoc)) nhung cong san ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sang - thanh ((trung cap) OR (trung hoc)) nhung cong san ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doi chi sang - thanh ((trung cap) or (trung hoc)) nhung cong san ((toan cau) or (toan tap))*.