Perhaps you should try some spelling variations:
trung tran » trung tuan, trung thanh, trung tam
hoc tieng » hoc hien
tieng han » tieng anh
tran tuan » tran xuan, tran quang, tran thanh
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tieng han - thanh ((trung tran) OR (tran tuan)) dung cong dan than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc tieng han - thanh ((trung tran) OR (tran tuan)) dung cong dan than cao".
• Adding a wildcard symbol may retrieve word variants: hoc tieng han - thanh ((trung tran) OR (tran tuan)) dung cong dan than cao*.