Perhaps you should try some spelling variations:
hoc thanh » hoc nhanh, hoan thanh, hoc phan
kdung hoc » khung hoc, trung hoc, dong hoc
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
dung hoc » dong hoc, dung thuoc, trung hoc
cao phan » co phan, cho phan, cac phan
phan van » pham van, thanh van, luan van
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
hoi cao » hoc cao, hoi co, hoi cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach hoc tap, nghien cuu cong hoc thanh ((dung hoc) or (kdung hoc)) mai hoi cao phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu cong hoc thanh ((dung hoc) OR (kdung hoc)) mai hoi cao phan van.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu cong hoc thanh ((dung hoc) or (kdung hoc)) mai hoi cao phan van*.