Perhaps you should try some spelling variations:
thanh quang » nhanh quang, thanh quan, than quang
canh thanh » canh tranh, danh thanh, anh thanh
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
dan phan » doan phan, dan chan, van phan
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu manh) or (chieu sach)) - canh thanh quang ((dung cong) OR (dung trong)) dan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (chieu sach)) - canh thanh quang ((dung cong) OR (dung trong)) dan phan cac*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu manh) or (chieu sach)) - canh thanh quang ((dung cong) OR (dung trong)) dan phan cac*".