Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hien xanh » hien hanh, hien nhanh, chieu xanh
dang cong » dung cong
trinh vu » trinh va, trinh ve, trinh vi
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than
vu dang » su dang, vu quang, cua dang

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 xanh - canh trinh vu dang cong ((dan toan) OR (dan than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - canh trinh vu dang cong ((dan toan) OR (dan than)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh trinh vu dang cong ((dan toan) OR (dan than)) cau*.