Perhaps you should try some spelling variations:
trung thang » trung thanh, trung tang, truong thanh
trung tham » trung tam, trung thanh, trung ha
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
hoc thieu » toc thieu, hoc hien
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: ((doi chieu) or (hoc thieu)) xanh - manh ((trung tham) OR (trung thang)) nhung cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc thieu)) xanh - manh ((trung tham) OR (trung thang)) nhung cong tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (hoc thieu)) xanh - manh ((trung tham) OR (trung thang)) nhung cong tac toan tap".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (hoc thieu)) xanh - manh ((trung tham) OR (trung thang)) nhung cong tac toan tap*.