Perhaps you should try some spelling variations:
quan thong » quang thong, quan trong, xuan thong
thieu xanh » chieu xanh, thien anh, thien danh
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
canh ban » can ban, canh dan, canh van
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
anh van » anh va, thanh van, doanh 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 ((thieu xanh) OR (hieu manh)) - ((canh ban) or (anh van)) quan thong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - ((canh ban) OR (anh van)) quan thong cong san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - ((canh ban) or (anh van)) quan thong cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - ((canh ban) or (anh van)) quan thong cong san toan ban*.