Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
trinh toan » tinh toan, thanh toan, trinh han
thuc nhung » phuc nhung, thu nhung, thuat nhung
thuc chung » thuc cung, thung chung, thuat chung
cong than » cong thanh, cong thang, cong tan
than phan » thanh phan, toan phan, thanh pham

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (chieu sang)) - trinh toan ((thuc nhung) OR (thuc chung)) cong than phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - trinh toan ((thuc nhung) OR (thuc chung)) cong than phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sang)) - trinh toan ((thuc nhung) OR (thuc chung)) cong than phan tu".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sang)) - trinh toan ((thuc nhung) OR (thuc chung)) cong than phan tu*.