Perhaps you should try some spelling variations:
quan luong » luan luong, quan long, quan duong
luong cong » dung cong, trong cong, cong cong
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
cho xanh » cho doanh, cho thanh, cho hang
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: cao ((cho xanh) or (cho sinh)) - ((hanh tang) OR (hanh mang)) quan luong cong tac phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cao ((cho xanh) OR (cho sinh)) - ((hanh tang) OR (hanh mang)) quan luong cong tac phan lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cao ((cho xanh) or (cho sinh)) - ((hanh tang) OR (hanh mang)) quan luong cong tac phan lap".
• Adding a wildcard symbol may retrieve word variants: cao ((cho xanh) or (cho sinh)) - ((hanh tang) OR (hanh mang)) quan luong cong tac phan lap*.