Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
hanh trang » thanh trung, canh tranh, hanh trinh
nhung manh » nhung thanh, nhung van, nhung lang
hieu lang » chieu sang, nhieu tang, hieu van
trang cua » tranh cua, tang cua, trung cua
hung manh » hung anh, tung manh, duong manh
toan cau » toan cao, toan ban, toan tap
cua ung » cua rung, cua ong, cua nhung

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu lang) or (hieu quang)) - hanh trang cua ung ((hung manh) OR (nhung manh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (hieu quang)) - hanh trang cua ung ((hung manh) OR (nhung manh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) or (hieu quang)) - hanh trang cua ung ((hung manh) OR (nhung manh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (hieu quang)) - hanh trang cua ung ((hung manh) OR (nhung manh)) toan cau*.