Perhaps you should try some spelling variations:
chiet tach » chieu sach
truong cao » truong dai
truong va » truong dai, truong dao, luong va
cong tinh » cong trinh, long tinh, cong thanh
cong vinh » cong trinh, trong vinh, cong viec
ho chiet » ho chieu, ho thiet, hoc thiet
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 tach - manh ((truong cao) OR (truong va)) dung ((cong tinh) OR (cong vinh)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - manh ((truong cao) or (truong va)) dung ((cong tinh) OR (cong vinh)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - manh ((truong cao) or (truong va)) dung ((cong tinh) OR (cong vinh)) toan cao*.