Perhaps you should try some spelling variations:
nghien tach » nghiep cach, nghiep sach, nghiem sach
thanh trung » thanh tung
hoc nghien » hoc hien
hang cong » dang cong, hang nong, bang cong
tam hang » nam thang, pham hang, tam huong
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nghien tach - thanh trung tam hang cong dan phan tu~.
• Adding a wildcard symbol may retrieve word variants: hoc nghien tach - thanh trung tam hang cong dan phan tu*.