Perhaps you should try some spelling variations:
thanh trung » thanh tung
nang thanh » dang thanh, tang thanh, nhanh thanh
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
van hoang » van hoan, quan hoang, tran hoang
cong nang » cong ngang, cong lang, cong nong
van hang » van khang, van thang, ban hang
thanh tu » hanh tu, nhanh tu, thanh tung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (hieu manh)) - thanh trung ((van hang) OR (van hoang)) cong nang thanh tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu manh)) - thanh trung ((van hang) OR (van hoang)) cong nang thanh tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (hieu manh)) - thanh trung ((van hang) OR (van hoang)) cong nang thanh tu".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu manh)) - thanh trung ((van hang) OR (van hoang)) cong nang thanh tu*.