Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
cong thang » cong thanh, cang thang, cung thang
cong thong » cong thuong, cong trong, dong thong
thieu anh » thien anh, chieu xanh, thieu nhi
toan thuc » toan hoc, dan thuc, nhan thuc
thuc hung » thuc chung, thuc nhung, thuc dung
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 ((thieu anh) OR (thien danh)) - tinh toan thuc hung ((cong thang) or (cong thong)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu anh) OR (thien danh)) - tinh toan thuc hung ((cong thang) OR (cong thong)) phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu anh) OR (thien danh)) - tinh toan thuc hung ((cong thang) or (cong thong)) phan cac".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu anh) OR (thien danh)) - tinh toan thuc hung ((cong thang) or (cong thong)) phan cac*.