Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
sach thoi » cach thoi, sach hoi, sach tham
doanh hoa » doanh khoa, doanh hoan, danh hoa
thoi tap » toi tap, hoc tap, thoi dai
van luan » van quan, van tuan, von luan
mot hoc » mo hoc, mot goc, bot hoc
mon hoc » toan hoc, dong hoc
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 tap, nghien cuu ((mot hoc) or (mon hoc)) doanh hoa hoc ma hai van luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach thoi tap, nghien cuu ((mot hoc) OR (mon hoc)) doanh hoa hoc ma hai van luan van.
• Adding a wildcard symbol may retrieve word variants: nuoc sach thoi tap, nghien cuu ((mot hoc) or (mon hoc)) doanh hoa hoc ma hai van luan van*.