Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hien nhanh » hien hanh, thien thanh, tien thanh
thuc nhung » phuc nhung, thu nhung, thuc chung
thuc hung » thuc chung, thuc dung, thuc cung
cong toan » cong tan, cong hoan, cong tuan
toan phan » thanh phan, toan ban, hoa phan
phan cac » nhan cach, phan dau, phan lap

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 sang) or (hien nhanh)) - tinh toan ((thuc hung) OR (thuc nhung)) cong toan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hien nhanh)) - tinh toan ((thuc hung) OR (thuc nhung)) cong toan phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (hien nhanh)) - tinh toan ((thuc hung) OR (thuc nhung)) cong toan phan cac".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hien nhanh)) - tinh toan ((thuc hung) OR (thuc nhung)) cong toan phan cac*.