Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
nganh nong » nganh cong
hoc nganh » hoc nhanh
can thanh » ban thanh, van thanh, cac thanh
thanh van » thanh san, thanh toan, thanh phan
mach hoc » cach hoc, dich hoc, anh hoc
khoa can » khoa cam, khoa cap, khoi can
tu mach » tu cach, tu manh, tu hach
thon xa » thong xa, thong xay, thong va
thoi xa » thoi xua, thi xa, thoi va
huu mo » huu mot, huu co, huu ho
mo hoc » mon hoc, co hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu mach hoc tap, nghien huu mo hoc nganh nong ((thon xa) OR (thoi xa)) khoa can thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien huu mo hoc nganh nong ((thon xa) OR (thoi xa)) khoa can thanh van".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien huu mo hoc nganh nong ((thon xa) OR (thoi xa)) khoa can thanh van*.