Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
khoa hoc » hoa hoc
tinh van » trinh van, dinh van, tinh va
su sach » so sach, vu sach
han hoc » nhan hoc, than hoc, van hoc
hoi may » hoc may, hoa may, noi may
ma hoi » mai hoi, xa hoi, ma hoa

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

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