Perhaps you should try some spelling variations:
cong luong » cong thuong, nang luong, cong dong
lieu tinh » trieu tinh, diep tinh, bien tinh
hanh sinh » hanh tinh, hanh dinh, hinh sinh
doi lieu » duoc lieu, doi chieu, du lieu
sinh cua » manh cua, dinh cuu, sinh va
bai toan » bai tap
va toan » van toan, tap toan, va thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi lieu tinh - hanh sinh cua cong luong ((va toan) OR (bai toan)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi lieu tinh - hanh sinh cua cong luong ((va toan) OR (bai toan)) ban".
• Adding a wildcard symbol may retrieve word variants: doi lieu tinh - hanh sinh cua cong luong ((va toan) OR (bai toan)) ban*.