Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
thanh son » thanh san, thanh cong, thanh toan
va phuong » va thuong, cac phuong
va thong » va thuong, he thong, va cong
cong san » cong tac
san phan » san pham, van phan, sat phan
phan lap » phan 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 - thanh son ((va thong) or (va phuong)) cong san phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh son ((va thong) OR (va phuong)) cong san phan lap.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh son ((va thong) or (va phuong)) cong san phan lap*.