Perhaps you should try some spelling variations:
cong thuoc » cong thuc, dong thuoc, long thuoc
hoc thanh » hoc nhanh, hoan thanh, hoc phan
cach hoc » cach thuc, cach thoi, cac hop
dich hoc » sinh hoc, hinh hoc, tinh hoc
cuu long » cuu cong, cuu tong, cuu nang
long hoc » dong hoc, long soc, long thuoc
thuoc xa » thuoc ma, thuoc va, thuoc la
dan pham » san pham, dan phan, van pham
hoi dan » hoa dan, hoc dan, hoi dap
pham va » pham van, pham ma, pham tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((cach hoc) or (dich hoc)) tap, nghien cuu long hoc thanh cong thuoc xa hoi dan pham va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((cach hoc) OR (dich hoc)) tap, nghien cuu long hoc thanh cong thuoc xa hoi dan pham va.
• Adding a wildcard symbol may retrieve word variants: tu ((cach hoc) or (dich hoc)) tap, nghien cuu long hoc thanh cong thuoc xa hoi dan pham va*.