Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
cua thong » cua thuong, cua khong, cua tong
cong manh » cong danh, duong manh, cong thanh
canh ban » can ban, canh dan, canh van
toan cao » toan ban
toan tap » toan ban
can van » cac van, can ban, tan van

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)) cua thong cong manh ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((canh ban) OR (can van)) cua thong cong manh ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((canh ban) or (can van)) cua thong cong manh ((toan cao) or (toan tap))*.