Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh toan » tinh toan, thanh toan, trinh han
hien xanh » hien hanh, hien nhanh, chieu xanh
toan hang » toan thang, toan hanh, toan mang
hang cong » dang cong, hang nong, bang cong
san phan » san pham, sat phan, dan phan
van phan » van phong, van thanh, luan phan

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 toan hang cong ((san phan) OR (van phan)) dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - canh trinh toan hang cong ((san phan) OR (van phan)) dau".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh trinh toan hang cong ((san phan) OR (van phan)) dau*.