Perhaps you should try some spelling variations:
nganh khung » nganh khong, nhanh hung
hoc nganh » hoc nhanh
khung hoc » chung hoc, nhung hoc, thuong hoc
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
cac thoi » cac toi, cac hop, cac tro
tinh san » trinh san, tinh sang, tinh son
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
va tinh » may tinh

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