Perhaps you should try some spelling variations:
dong thuoc » dung thuoc, dang thuoc, don thuoc
nganh dong » nganh cong, nhanh dong, nganh nong
hoc nganh » hoc nhanh
thu sach » tu sach, thuat sach, thuoc sach
thuoc va » thuc va, thuoc ma, thuong va
gian dan » gian lang
cuu mon » cuu mo, cuu mot, cuu cong
hoi tai » hoc tai, hoi trac
hoi tap » hoi dap, hoc tap, hai tap
ca gian » ca giang, ca giao, va gian
mon hoc » toan hoc, dong hoc
va hoi » xa hoi, va hoc, va hoa
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 ((hoi tap) OR (hoi tai)), nghien cuu mon hoc nganh dong thuoc va hoi ca gian dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((hoi tap) OR (hoi tai)), nghien cuu mon hoc nganh dong thuoc va hoi ca gian dan*".