Perhaps you should try some spelling variations:
nguyen huu » nguyen duc
nganh nong » nganh cong
thu mach » thu sach, thuat mach, thu hoach
mach hoc » cach hoc, dich hoc, anh hoc
nong hoc » dong hoc, nang hoc, nong thon
khoa cau » khoa chau, khoa cam, hoa cau
cau luan » cu luan, dau luan, lau luan
mot hoc » mon hoc, mo hoc, bot hoc
xa khoa » da khoa, bia khoa, tai khoa
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: thu mach hoc tap, nguyen huu ((mot hoc) or (mot goc)) nganh nong hoc xa khoa cau luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu mach hoc tap, nguyen huu ((mot hoc) OR (mot goc)) nganh nong hoc xa khoa cau luan van.
• Adding a wildcard symbol may retrieve word variants: thu mach hoc tap, nguyen huu ((mot hoc) or (mot goc)) nganh nong hoc xa khoa cau luan van*.