Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nghien cua » nghien cuu, nghiep cua, nghiep vua
hoc thanh » hoc nhanh, hoan thanh, hoc phan
thanh hoa » thanh pho
cong hoc » dong hoc, cong hoa, cong coc
van phan » van phong, van thanh, luan phan
phan dau » phan tu, hang dau
hoi tai » hoc tai
hoi van » hoi va, hoi dan, hai van
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: thuoc sach ((hoi tai) or (hoi trac)), nghien cua cong hoc thanh hoa hoc xa hoi van phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((hoi tai) OR (hoi trac)), nghien cua cong hoc thanh hoa hoc xa hoi van phan dau.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((hoi tai) or (hoi trac)), nghien cua cong hoc thanh hoa hoc xa hoi van phan dau*.