Perhaps you should try some spelling variations:
nghien tach » nghiep cach, nghiep sach, nghiem sach
thanh trung » thanh tung
hoc nghien » hoc hien
trung tai » truong tai, trung tam, trung dai
bang song » nang song
tai bang » thai bang, tai ban, hai bang
song dan » song danh, song van, cong 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 tai bang song dan phan tu~.
• Adding a wildcard symbol may retrieve word variants: hoc nghien tach - thanh trung tai bang song dan phan tu*.