Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nhanh khong » nhanh chong, nganh khong, nhan khong
hoc nhanh » hoc nganh, hoc phan
sach hoc » cach hoc, sach hoi, sach duoc
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
thuoc va » thuc va, thuoc ma, thuong va
phap vat » phap luat, phap phat, phap viet
hoi ban » hoi dan, hoi bai, doi ban
va hoi » xa hoi, va hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sach hoc) OR (mach hoc)) tap, nghien cuu dong hoc nhanh khong thuoc va hoi ban phap vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach hoc) OR (mach hoc)) tap, nghien cuu dong hoc nhanh khong thuoc va hoi ban phap vat".
• Adding a wildcard symbol may retrieve word variants: so ((sach hoc) OR (mach hoc)) tap, nghien cuu dong hoc nhanh khong thuoc va hoi ban phap vat*.