Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hien xanh » hien hanh, hien nhanh, chieu xanh
cong bang » cuong bang, dong bang, hong bang
bang toan » bong toan, dang toan, bang thanh
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
toan ban » van ban

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 - hanh tranh ((cua dung) OR (cua dang)) cong bang toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh tranh ((cua dung) OR (cua dang)) cong bang toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh tranh ((cua dung) OR (cua dang)) cong bang toan ban*.