Perhaps you should try some spelling variations:
hoc nhanh » hoc nganh, hoc phan
chong hoc » chung hoc, chong doc, thong hoc
thong hoa » thong khoa, thong ha, thong hoc
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan
toc sach » hoc sach, doc sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
hoi van » hoi va, hoi dan, hai van

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach hoc tap, nghien cuu dong hoc nhanh ((chong hoc) or (thong hoa)) xa hoi van thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach hoc tap, nghien cuu dong hoc nhanh ((chong hoc) OR (thong hoa)) xa hoi van thanh van*.