Perhaps you should try some spelling variations:
quan nhung » qua nhung, cua nhung, luan chung
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
canh ban » canh dan, canh van, doanh ban
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap
can van » cac van, tan van, cao van
can ban » van ban, toan 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 - ((canh ban) or (((can van) OR (can ban)))) quan nhung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((canh ban) OR (((can van) OR (can ban)))) quan nhung cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - ((canh ban) or (((can van) OR (can ban)))) quan nhung cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((canh ban) or (((can van) OR (can ban)))) quan nhung cong san toan cao*.