Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh trang » thanh trung, hanh trinh, minh trang
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
va thong » va thuong, va phuong, he thong
cong dan » cong san, cong tan, huong dan
dan dung » van dung, tin dung, ap dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - ((hanh trang) OR (canh tranh)) va thong cong dan dung tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - ((hanh trang) OR (canh tranh)) va thong cong dan dung tai".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((hanh trang) OR (canh tranh)) va thong cong dan dung tai*.