Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
lang thang » cang thang, dang thanh, hung thang
hieu manh » chieu xanh, hieu nganh, dieu hanh
cang tang » cang thang, cong tang, mang thang
dung cong » dung trong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
ca dung » cao dung, cap dung, cu dung

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)) - ((cang tang) OR (lang thang)) ca dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - ((cang tang) OR (lang thang)) ca dung cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (hieu manh)) - ((cang tang) OR (lang thang)) ca dung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu manh)) - ((cang tang) OR (lang thang)) ca dung cong tac toan cau*.