Perhaps you should try some spelling variations:
chieu tinh » lieu tinh, chau tinh, kieu tinh
thong cong » trong cong, tong cong, thong thong
trinh toan » tinh toan, thanh toan, trinh han
trinh cua » trinh luat, trinh quan, trinh luan
tinh cua » sinh cua, tinh chat, tranh cua
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao ((chieu tinh) OR (trieu tinh)) - hanh ((trinh cua) or (tinh cua)) thong cong trinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao ((chieu tinh) OR (trieu tinh)) - hanh ((trinh cua) OR (tinh cua)) thong cong trinh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chao ((chieu tinh) OR (trieu tinh)) - hanh ((trinh cua) or (tinh cua)) thong cong trinh toan cao".
• Adding a wildcard symbol may retrieve word variants: chao ((chieu tinh) OR (trieu tinh)) - hanh ((trinh cua) or (tinh cua)) thong cong trinh toan cao*.