Perhaps you should try some spelling variations:
nhanh khoa » nhan khoa, nganh khoa, hang khoa
nghien huu » nghien cuu, nguyen huu, nhiem huu
sach thoi » cach thoi, sach hoi, cac thoi
sach tham » sach nha
hoc nhanh » hoc nganh, hoc phan
khoa hoc » hoa hoc
van luan » van quan, van tuan, von luan
mot hoc » mon hoc, mo hoc, mot goc
hai van » thai van, ha van, hai tan
huu mot » cuu mot, huy mot, hieu mot
hoc ta » hoc tap, hoc tai, hoc tan
ta hai » tai hai, tac hai, tra hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc ((sach thoi) or (sach tham)) tap, nghien huu mot hoc nhanh khoa hoc ta hai van luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc ((sach thoi) OR (sach tham)) tap, nghien huu mot hoc nhanh khoa hoc ta hai van luan van.
• Adding a wildcard symbol may retrieve word variants: nuoc ((sach thoi) or (sach tham)) tap, nghien huu mot hoc nhanh khoa hoc ta hai van luan van*.