Perhaps you should try some spelling variations:
nhanh hung » thanh hung, nhanh hong, nhanh chuong
hoc nhanh » hoc nganh, hoc phan
tinh san » trinh san, tinh sang, tinh son
cac thoi » cac toi, cac hop, cac tro
sach hoi » sach doi, sach moi, cach thoi
hung hoc » chung hoc, khung hoc, nhung hoc
cong hoc » dong hoc, cong hoa, cong coc
cuu cong » cua cong, thu cong, cac cong
mai hoi » mai khoi, dai hoi, lai hoi
hoi tap » hoi dap, hoc tap, hoi tai
va tinh » may tinh
tu sach » thu sach, su sach, te sach

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 hoi tap, nghien cuu cong hoc nhanh hung hoc ((mai hoi) or (cac thoi)) va tinh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi tap, nghien cuu cong hoc nhanh hung hoc ((mai hoi) OR (cac thoi)) va tinh san.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tap, nghien cuu cong hoc nhanh hung hoc ((mai hoi) or (cac thoi)) va tinh san*.