Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong sang » cong san, cong lang, cong vang
thanh cac » hanh cac, thanh ca, tranh cac
thanh bac » nhanh bac, thanh bai, thanh san
ho chieu » theo chieu, hoc thieu, doi chieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hien) or (ho chieu)) xanh - canh tranh cua thong cong sang ((thanh cac) OR (thanh bac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (ho chieu)) xanh - canh tranh cua thong cong sang ((thanh cac) OR (thanh bac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hien) or (ho chieu)) xanh - canh tranh cua thong cong sang ((thanh cac) OR (thanh bac))".
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (ho chieu)) xanh - canh tranh cua thong cong sang ((thanh cac) OR (thanh bac))*.