Perhaps you should try some spelling variations:
dien sach » dien anh
canh manh » lanh manh, canh tranh, cach mang
cua trong » cua truong, cua trung, qua trong
hoc dien » hoc hien, hoc vien, hoc dieu
manh cua » doanh cua, ban cua
cong sat » cong suat, cong hat, cong nhat
cong san » cong tac
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dien sach - canh manh cua trong ((cong sat) or (cong san)) phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dien sach - canh manh cua trong ((cong sat) OR (cong san)) phan lap*.