Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
nganh dong » nganh cong, nhanh dong, nganh nong
dong thuoc » dung thuoc, dang thuoc, don thuoc
hoc nganh » hoc nhanh
gian lang » gian dan
sach hoc » cach hoc, sach hoi, mach hoc
dich hoc » sinh hoc, hinh hoc, tinh hoc
cua post » cua mot, a post, cua bot
thuoc xa » thuoc ma, thuoc va, thuoc la
hoi dan » hoa dan, hoc dan, hoi dap

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 hoc) or (dich hoc)) tap, nghien cua post hoc nganh dong thuoc xa hoi dan gian lang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoc) OR (dich hoc)) tap, nghien cua post hoc nganh dong thuoc xa hoi dan gian lang.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoc) or (dich hoc)) tap, nghien cua post hoc nganh dong thuoc xa hoi dan gian lang*.