Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
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
phan lap » phan dau
hang dau » hang va, hang tai

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 sach - tinh toan thuc hung cong than ((phan lap) or (((hang dau) or (phan tu))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - tinh toan thuc hung cong than ((phan lap) OR (((hang dau) OR (phan tu)))).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - tinh toan thuc hung cong than ((phan lap) or (((hang dau) or (phan tu))))*.