Perhaps you should try some spelling variations:
kieu tinh » trieu tinh, diep tinh, bien tinh
lieu tinh » trieu tinh, diep tinh, bien tinh
nang hang » nang sang, hang hang, cang thang
cong cong » cong dong, trong cong, dung cong
hang cua » mang cua, hang ca, huong cua
tac toan » tam toan, hach toan, tich toan
tap toan » tap doan, tap quan, bai toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((kieu tinh) or (lieu tinh)) - nang hang cua cong cong ((tac toan) OR (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((kieu tinh) OR (lieu tinh)) - nang hang cua cong cong ((tac toan) OR (tap toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((kieu tinh) or (lieu tinh)) - nang hang cua cong cong ((tac toan) OR (tap toan)) cau".
• Adding a wildcard symbol may retrieve word variants: theo ((kieu tinh) or (lieu tinh)) - nang hang cua cong cong ((tac toan) OR (tap toan)) cau*.