Perhaps you should try some spelling variations:
hoc doanh » hoa doanh, hoc danh, hoc dan
doanh hoa » doanh khoa, doanh hoan, danh hoa
mach hoc » cach hoc, dich hoc, anh hoc
cuu nang » chuc nang, cam nang, cuu van
nang hoc » nang doc, nang luc, dong hoc
phan dan » phan dang, phan dau, nhan dan
su mach » su sach
mai hoi » mai khoi, dai hoi, lai hoi
va phan » van phan, va phat, va phap
ma hoi » xa hoi, ma hoa, me hoi

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 hoc tap, nghien cuu nang hoc doanh hoa hoc ((ma hoi) or (mai hoi)) va phan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su mach hoc tap, nghien cuu nang hoc doanh hoa hoc ((ma hoi) OR (mai hoi)) va phan dan.
• Adding a wildcard symbol may retrieve word variants: su mach hoc tap, nghien cuu nang hoc doanh hoa hoc ((ma hoi) or (mai hoi)) va phan dan*.