Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
trong manh » trong minh, trong anh, trong mach
hieu lang » hieu quang, nhieu tang, hieu van
manh toan » thanh toan, anh tuan, tinh toan
tan dung » tran dung, van dung, dan dung
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: ho ((hieu lang) OR (chieu sang)) - thanh trung ((tan dung) or (tin dung)) trong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sang)) - thanh trung ((tan dung) OR (tin dung)) trong manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (chieu sang)) - thanh trung ((tan dung) or (tin dung)) trong manh toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (chieu sang)) - thanh trung ((tan dung) or (tin dung)) trong manh toan cau*.