Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
nuoc sach » nguoi sach, hoc sach, cuoc cach
sach thoi » cach thoi, sach hoi, sach tham
hoc nganh » hoc nhanh
thoi tap » toi tap, hoc tap, thoi dai
khoa hoc » hoa hoc
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
hai van » thai van, hai tan, hao van
ha van » hoa van, nha van, va van

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 tap, nghien cuu mot hoc nganh khoa hoc ma ((hai van) OR (ha van)) luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach thoi tap, nghien cuu mot hoc nganh khoa hoc ma ((hai van) OR (ha van)) luan van".
• Adding a wildcard symbol may retrieve word variants: nuoc sach thoi tap, nghien cuu mot hoc nganh khoa hoc ma ((hai van) OR (ha van)) luan van*.