Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
thanh phan » thanh pho, thanh san, thanh toan
su sach » so sach
vu sach » vu bach, vu khach
dan hoa » danh hoa, dan hoat, dan khoa
hoi gia » ho gia, hoc gia, hoa gia
cua co » cua bo, cua cong
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: ((su sach) or (vu sach)) hoc tap, nghien cua co hoc dan hoa hoc xa hoi gia thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) hoc tap, nghien cua co hoc dan hoa hoc xa hoi gia thanh phan.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) hoc tap, nghien cua co hoc dan hoa hoc xa hoi gia thanh phan*.