Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nganh khong » nganh cong, nhanh chong, nganh nong
nghien cua » nghien cuu, nghiep cua, nghiep vua
hoc nganh » hoc nhanh
sach hoi » sach doi, sach moi, cach thoi
hinh hoc » sinh hoc, tin hoc, benh hoc
thuoc xa » thuoc ma, thuoc va, thuoc la
gian dan » gian lang
hoi dan » hoa dan, hoc dan, hoi dap
bo hoc » bao hoc, bot hoc, co hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach hoi) or (hinh hoc)) tap, nghien cua bo hoc nganh khong thuoc xa hoi dan gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoi) OR (hinh hoc)) tap, nghien cua bo hoc nganh khong thuoc xa hoi dan gian dan.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoi) or (hinh hoc)) tap, nghien cua bo hoc nganh khong thuoc xa hoi dan gian dan*.