Perhaps you should try some spelling variations:
nganh khong » nganh cong, nganh nong, nganh khoa
nhanh chong » thanh cong, khanh phong
sach hoc » cach hoc, sach hoi, mach hoc
tu sach » thu sach, su sach, te sach
va luan » vay luan, van luan, va quan
cuu co » huu co, cua co, cuu mo
hoc xa » hoc ma

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 co hoc ((nganh khong) or (nhanh chong)) hoc xa hoi va luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu co hoc ((nganh khong) OR (nhanh chong)) hoc xa hoi va luan van.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu co hoc ((nganh khong) or (nhanh chong)) hoc xa hoi va luan van*.