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
cong san » cong tac
phan cac » nhan cach, phan lap, phan van
phan dau » phan tu, hang dau

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 cac) OR (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 cac) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh trinh toan hang cong san ((phan cac) OR (phan dau))*.