Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lieu tinh » diep tinh, bien tinh
trinh cua » trinh luat, trinh quan, trinh luan
cong vinh » cong trinh, trong vinh, cong viec
vinh toan » tinh toan, hinh toan, minh toan
tinh cua » sinh cua, tinh chat, tranh cua
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: du ((lieu tinh) or (trieu tinh)) - hanh ((trinh cua) OR (tinh cua)) nhung cong vinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: du ((lieu tinh) OR (trieu tinh)) - hanh ((trinh cua) OR (tinh cua)) nhung cong vinh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "du ((lieu tinh) or (trieu tinh)) - hanh ((trinh cua) OR (tinh cua)) nhung cong vinh toan tap".
• Adding a wildcard symbol may retrieve word variants: du ((lieu tinh) or (trieu tinh)) - hanh ((trinh cua) OR (tinh cua)) nhung cong vinh toan tap*.