Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh luan » trinh luat, trinh quan, trinh han
luan luong » luan phuong, tuan duong, van luong
luong cong » dung cong, trong cong, cong cong
cua tinh » va tinh, ha tinh, hoa tinh
cua sinh » hoa sinh, va sinh
tap doan » tap quan
van tuan » van quan, van ban, anh tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi ((cua tinh) OR (cua sinh)) - canh trinh luan luong cong ((tap doan) or (van tuan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi ((cua tinh) OR (cua sinh)) - canh trinh luan luong cong ((tap doan) OR (van tuan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi ((cua tinh) OR (cua sinh)) - canh trinh luan luong cong ((tap doan) or (van tuan)) tap".
• Adding a wildcard symbol may retrieve word variants: hoi ((cua tinh) OR (cua sinh)) - canh trinh luan luong cong ((tap doan) or (van tuan)) tap*.