Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
sach hoc » cach hoc, sach hoi, mach hoc
cong hoc » dong hoc, cong hoa, cong coc
mai hoi » mai khoi, dai hoi, lai hoi
va phap » va phat, ban 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: thuoc sach hoc tap, nghien thu cong hoc nganh hoa hoc ((ma hoi) or (mai hoi)) va phap day~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach hoc tap, nghien thu cong hoc nganh hoa hoc ((ma hoi) OR (mai hoi)) va phap day.
• Adding a wildcard symbol may retrieve word variants: thuoc sach hoc tap, nghien thu cong hoc nganh hoa hoc ((ma hoi) or (mai hoi)) va phap day*.