Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
nganh khoa » nganh hoa, nganh khong, doanh khoa
sach thoi » sach hoi, sach tham, cac thoi
cach thoi » cac thoi, cach thuc, cach noi
hoc nganh » hoc nhanh
khoa hoc » hoa hoc
van luan » van quan, van tuan, von luan
huu mot » cuu mot, huy mot, hieu mot
mot hoc » mon hoc, mo hoc, mot goc
hai van » thai van, ha van, hai tan
ma hai » ta hai, va hai, xa 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 (cach thoi)) tap, nghien huu mot hoc nganh khoa hoc ma hai van luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc ((sach thoi) OR (cach thoi)) tap, nghien huu mot hoc nganh khoa hoc ma hai van luan van.
• Adding a wildcard symbol may retrieve word variants: nuoc ((sach thoi) or (cach thoi)) tap, nghien huu mot hoc nganh khoa hoc ma hai van luan van*.