Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
hieu lang » chieu sang, nhieu tang, hieu van
tranh cua » doanh cua
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
manh cua » doanh cua, ban cua
toan cau » toan cao, toan ban, toan tap

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