Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
thanh son » thanh san, thanh cong, thanh toan
dung cong » dung trong
cong tinh » cong trinh, cong vinh, long tinh
hang ban » hang luan, hang va, hang tai
qua dung » quang dung, su dung, qua song
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 - ((hang ban) or (thanh son)) qua dung cong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((hang ban) OR (thanh son)) qua dung cong tinh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((hang ban) or (thanh son)) qua dung cong tinh toan ban*.