Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan
anh van » anh va, thanh van, doanh van
van va » van vat, van van, ban va

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)) - anh van va nhung cong ((van toan) or (van tuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - anh van va nhung cong ((van toan) OR (van tuan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - anh van va nhung cong ((van toan) or (van tuan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - anh van va nhung cong ((van toan) or (van tuan)) cao*.