Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
tang cua » mang cua, hang cua, tang luan
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 ((chuc nang) or (lieu tinh)) - hanh tang cua nhung cong ((tac toan) OR (tap toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chuc nang) OR (lieu tinh)) - hanh tang cua nhung cong ((tac toan) OR (tap toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chuc nang) or (lieu tinh)) - hanh tang cua nhung cong ((tac toan) OR (tap toan)) tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chuc nang) or (lieu tinh)) - hanh tang cua nhung cong ((tac toan) OR (tap toan)) tap*.