Perhaps you should try some spelling variations:
truong ca » truong cao, trong ca, truong dai
truong va » truong dai, truong cao, truong dao
dung cong » dung trong
cong tinh » cong trinh, cong vinh, long tinh
ho chiet » ho thiet, hoc thiet, hoa thiet
ho chieu » theo chieu, hoc thieu, doi chieu
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (ho chieu)) tach - manh ((truong ca) OR (truong va)) dung cong tinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) OR (ho chieu)) tach - manh ((truong ca) or (truong va)) dung cong tinh toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) OR (ho chieu)) tach - manh ((truong ca) or (truong va)) dung cong tinh toan cau*.