Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
sach hoi » sach doi, sach moi, cach thoi
hoi cham » hoi chuc, hoi chu, toc cham
nang van » dang van, tang van, lang van
su sach » so sach, vu sach
hoi tap » hoi dap, hoc tap, hoi tai
huu mot » cuu mot, huy mot, hieu mot
mot hoc » mon hoc, mo hoc, mot goc
hoi cam » hoi cac, hoi cau, khoa cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach hoi tap, nghien huu mot hoc nganh hoa hoc ma ((hoi cam) or (hoi cham)) nang van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoi tap, nghien huu mot hoc nganh hoa hoc ma ((hoi cam) OR (hoi cham)) nang van.
• Adding a wildcard symbol may retrieve word variants: su sach hoi tap, nghien huu mot hoc nganh hoa hoc ma ((hoi cam) or (hoi cham)) nang van*.