Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
hoc nhanh » hoc phan
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
thuoc ma » hoc ma, duoc ma
cua nhan » ca nhan, cua ngan, cua nha
hoi cua » hoi chuc
nhan va » nhan tai, nhan dan, nhan tao
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: thuoc sach hoc tap, nghien cuu cong ((hoc nganh) or (hoc nhanh)) khong thuoc ma hoi cua nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach hoc tap, nghien cuu cong ((hoc nganh) OR (hoc nhanh)) khong thuoc ma hoi cua nhan va.
• Adding a wildcard symbol may retrieve word variants: thuoc sach hoc tap, nghien cuu cong ((hoc nganh) or (hoc nhanh)) khong thuoc ma hoi cua nhan va*.