Perhaps you should try some spelling variations:
dong thuoc » dung thuoc, dang thuoc, dong thuc
hoc nganh » hoc nhanh
don thuoc » dung thuoc, dang thuoc, doan phuoc
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
gian dan » gian lang
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
ca gian » ca giang, ca giao, va gian
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach hoc tap, nghien cuu mot hoc nganh ((dong thuoc) or (don thuoc)) le hoi ca gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach hoc tap, nghien cuu mot hoc nganh ((dong thuoc) OR (don thuoc)) le hoi ca gian dan*.