Perhaps you should try some spelling variations:
lieu tinh » trieu tinh, diep tinh, bien tinh
toan thuc » toan hoc, dan thuc, nhan thuc
thuc hung » thuc chung, thuc nhung, thuc dung
cong than » cong thanh, cong thang, cong thai
cong tan » cong tac, cong san, cong thanh
phan cac » nhan cach, phan dau, phan lap
so lieu » so dieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so lieu tinh - tinh toan thuc hung ((cong than) or (cong tan)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so lieu tinh - tinh toan thuc hung ((cong than) OR (cong tan)) phan cac*.