Perhaps you should try some spelling variations:
tieng thanh » tien thanh, tieng anh, tieng han
manh trung » manh tung, thanh trung, manh hung
hoc tieng » hoc hien
trung cua » truong cua, trung tuan, trung cap
cua trong » cua truong, cua trung, qua trong
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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 - manh trung cua trong cong dan van ban~.
• Adding a wildcard symbol may retrieve word variants: hoc tieng thanh - manh trung cua trong cong dan van ban*.