Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
thanh tai » thanh hai, thanh toan, doanh tai
van thanh » ban thanh, van tuan
phan cung » phan cong, phan ung, phan xuong
hoc phan » hoc dan, hoc pho
cung hoc » chung hoc, dung hoc, vung hoc
cong hoc » dong hoc, cong hoa, cong coc
cac cong » cua cong
tu hach » tu hanh, tu cach, tu sach
hai van » thai van, ha van, hai tan
tu mach » tu cach, tu manh, tu sach
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu mach) or (tu hach)) hoc tap, nghien cac cong hoc phan cung hoc xa hai van thanh tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu mach) OR (tu hach)) hoc tap, nghien cac cong hoc phan cung hoc xa hai van thanh tai*.