Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hien xanh » hien hanh, hien nhanh, chieu xanh
toan hang » toan thang, toan mang, toan tang
toan hanh » toan thanh, toan anh, tran hanh
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cac » nhan cach, phan dau, phan lap

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