Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
doi chieu » doi chi, ho chieu, mot chieu
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
trinh va » trinh van, trinh vat, trinh ve
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 chieu) OR (doc hieu)) sang - canh trinh va ((tong cong) or (cong cong)) dan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) sang - canh trinh va ((tong cong) OR (cong cong)) dan phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) sang - canh trinh va ((tong cong) or (cong cong)) dan phan cac".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) sang - canh trinh va ((tong cong) or (cong cong)) dan phan cac*.