Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
hoc nhanh » hoc phan
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
thuoc xa » thuoc ma, thuoc va, thuoc la
nhan tai » hang tai, van tai, toan tai
vu sach » vu bach, su sach, vu khach
hoi ca » hoi cua, hoi cac, hoi cau

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach hoc tap, nghien cuu dong ((hoc nganh) OR (hoc nhanh)) khong thuoc xa hoi ca nhan tai~".
• Adding a wildcard symbol may retrieve word variants: vu sach hoc tap, nghien cuu dong ((hoc nganh) OR (hoc nhanh)) khong thuoc xa hoi ca nhan tai*.