Perhaps you should try some spelling variations:
dong thuoc » dung thuoc, dang thuoc, don thuoc
nganh dong » nganh cong, nhanh dong, nganh nong
nghien huu » nghien cuu, nguyen huu, nhiem huu
hoc nganh » hoc nhanh
thu sach » tu sach, thuat sach, thuoc sach
thuoc la » thuoc ma, thuoc va, thuoc tai
gian dan » gian lang
huu mot » cuu mot, huy mot, hieu mot
hoi tap » hoc tap, hoi tai, hai tap
ca gian » ca giang, ca giao, va gian
mot hoc » mon hoc, mo hoc, mot goc
la hoi » lai hoi, xa hoi, le hoi
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 dap)), nghien huu mot hoc nganh dong thuoc la hoi ca gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((hoi tap) OR (hoi dap)), nghien huu mot hoc nganh dong thuoc la hoi ca gian dan*.