Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu xanh » chieu xanh, hieu manh, hieu nganh
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dung cong
trong cho » trong tho, trong co, rong cho
doc hieu » toc thieu, hoc thieu, hoc hien
nhung bo » nhung bi, nhung bai, nhung don
tran cao » toan cao, tran chau, trang cho

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 tranh cua ((nhung bo) OR (tong cong)) tan ((tran cao) OR (trong cho))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh tranh cua ((nhung bo) OR (tong cong)) tan ((tran cao) OR (trong cho))".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh tranh cua ((nhung bo) OR (tong cong)) tan ((tran cao) OR (trong cho))*.