Perhaps you should try some spelling variations:
manh thong » anh thong, manh tuong, mang thong
quang toan » quang tran, quang doan, quang hoan
quang tuan » quang thanh, quan luan, quang cua
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
thong qua » thong quan, thong cua, thong tu
dung cong » dung trong
qua dung » quang dung, su dung, qua song

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