Perhaps you should try some spelling variations:
phuong dung » thong dung, cuong dung, phuong hoang
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
trinh van » trinh quan, trinh toan, dinh van
trinh han » trinh quan
dung manh » duong manh, dung danh, hung manh
manh toan » thanh toan, anh tuan, tinh toan
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: nho ((hieu lang) or (chieu sang)) - canh ((trinh van) OR (trinh han)) phuong dung manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((hieu lang) OR (chieu sang)) - canh ((trinh van) OR (trinh han)) phuong dung manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nho ((hieu lang) or (chieu sang)) - canh ((trinh van) OR (trinh han)) phuong dung manh toan cau".
• Adding a wildcard symbol may retrieve word variants: nho ((hieu lang) or (chieu sang)) - canh ((trinh van) OR (trinh han)) phuong dung manh toan cau*.