Perhaps you should try some spelling variations:
tieng thanh » tien thanh, tieng anh, tieng han
hoc tieng » hoc hien
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
thanh cac » hanh cac, thanh ca, tranh cac
thanh bac » nhanh bac, thanh bai, thanh san
cong dan » cong san, cong tan, huong dan

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 thanh - thanh ((trung cua) or (trung cap)) trong cong dan ((thanh cac) or (thanh bac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tieng thanh - thanh ((trung cua) OR (trung cap)) trong cong dan ((thanh cac) OR (thanh bac)).
• Adding a wildcard symbol may retrieve word variants: hoc tieng thanh - thanh ((trung cua) or (trung cap)) trong cong dan ((thanh cac) or (thanh bac))*.