Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
toan thuc » toan hoc, dan thuc, nhan thuc
thuc hung » thuc chung, thuc nhung, thuc dung
hung cong » nhung cong, hung cuong, phung cong
cong than » cong thanh, cong thang, cong tan
ho chieu » theo chieu, hoc thieu, mot chieu
phan dau » hang dau

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

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