Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thuc phung » thuc chung, thuc nhung, thu phuong
cong thanh » dong thanh, cong tan, truong thanh
thieu anh » thien anh, thien danh, thieu nhi
toan thuc » toan hoc, dan thuc, nhan thuc
pham cac » phan cac, pham ca, pham can

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

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