Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
quan trong » gian trong
trinh toan » tinh toan, thanh toan, trinh han
hoc thieu » toc thieu, hoc hien
qua trong » qua trinh, qua song, qua cong
ho chiet » ho chieu, ho thiet, hoc thiet
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chiet) or (hoc thieu)) tach - thanh trong ((qua trong) OR (quan trong)) cong trinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (hoc thieu)) tach - thanh trong ((qua trong) OR (quan trong)) cong trinh toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) or (hoc thieu)) tach - thanh trong ((qua trong) OR (quan trong)) cong trinh toan tap*".