Perhaps you should try some spelling variations:
chien thang » chien thuong, chien chong, hien trang
dung trung » dung trong, quang trung, dung ung
trung thpt » truong thpt, trung thuc, trung nhat
thpt thang » thpt hung, tat thang, thpt quang
doi chien » doi chieu, doi hien, voi chien
tang luan » dung luan
thang tap » thang tam, hang tap, hang tai
tang dan » tang van, tung dan, tang quan

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

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