Perhaps you should try some spelling variations:
thuoc thanh » chuoc thanh, thuc thanh, hoc thanh
cong thuoc » cong thuc, dong thuoc, long thuoc
thanh hoa » thanh pho
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
phan van » thanh van, luan van, tran van
vu sach » vu bach, su sach, vu khach
hoc xa » hoc ma

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

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