Perhaps you should try some spelling variations:
chieu thang » chien thang, chieu khong, chieu sang
dung trung » dung trong, quang trung, dung ung
trung thpt » truong thpt, trung thuc, trung nhat
doi chieu » doc hieu, doi chi, mot chieu
thpt hang » thpt thang, thpt hung, thpt hong
tang dan » tang van, tung dan, tang luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu thang - hanh ((tang dan) or (dung luan)) dung trung thpt hang va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu thang - hanh ((tang dan) OR (dung luan)) dung trung thpt hang va.
• Adding a wildcard symbol may retrieve word variants: doi chieu thang - hanh ((tang dan) or (dung luan)) dung trung thpt hang va*.