Perhaps you should try some spelling variations:
luong thuoc » luong thuc, long thuoc, luong theo
thuoc doanh » thuoc dang, thuoc dong, thuoc thanh
cuu luong » cuu long, cu luong, cuu tuong
doanh hoa » doanh khoa, doanh hoan, danh hoa
sach hoc » cach hoc, sach hoi, mach hoc
nhan dan » phan dau, gian dan, nhan tai
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
va nhan » van nhan, ca nhan, va phan
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 sach hoc tap, nghien cuu luong thuoc doanh hoa hoc ((ma hoi) or (mai hoi)) va nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoc tap, nghien cuu luong thuoc doanh hoa hoc ((ma hoi) OR (mai hoi)) va nhan dan.
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien cuu luong thuoc doanh hoa hoc ((ma hoi) or (mai hoi)) va nhan dan*.