Perhaps you should try some spelling variations:
tkhanh son » thanh son, thanh san
hien xanh » hien hanh, hien nhanh, chieu xanh
hanh phan » thanh phan, anh phan, hanh han
khanh son » thanh son, nhanh song, thanh san
bang cong » dang cong, bang song, hang cong
cua bang » chua bang, cua ban, cua dang
cong san » cong tac
san ban » sang ban, van ban, can ban
ban tap » bai tap, han tap, ban tai

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 phan) or (((khanh son) or (tkhanh son)))) cua bang cong san ban tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((hanh phan) OR (((khanh son) OR (tkhanh son)))) cua bang cong san ban tap*.