Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sang » chieu sach, chieu xanh, nhieu tang
thuc chung » thuc cung, thuc nhung, thung chung
chung cong » nhung cong, chong cong, phung cong
cong thang » cong thanh, cang thang, cong thong
thang phan » thanh phan, thong phan, than phan
hieu lang » hieu quang, nhieu tang, hieu van
toan thuc » toan hoc, dan thuc, nhan thuc
phan lap » phan dau

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