Perhaps you should try some spelling variations:
nhieu tang » hieu lang, nhiet nang
chieu sang » chieu sach, chieu xanh, hieu lang
canh trinh » canh tranh, hanh trinh, canh tinh
van nhuong » van chuong, van phuong, van huong
van nhung » va nhung, van hung, van phung
dung tinh » dang tinh, dung ninh, dung tin
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 ((nhieu tang) or (chieu sang)) - canh trinh ((van nhung) OR (van nhuong)) dung tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((nhieu tang) OR (chieu sang)) - canh trinh ((van nhung) OR (van nhuong)) dung tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((nhieu tang) or (chieu sang)) - canh trinh ((van nhung) OR (van nhuong)) dung tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((nhieu tang) or (chieu sang)) - canh trinh ((van nhung) OR (van nhuong)) dung tinh toan cau*.