Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
sinh sach » chinh sach, sinh san, sang sach
truong va » truong dai, truong cao, truong dao
hoa sinh » cho sinh
trung va » trang va, trung ha, trung tam
tran van » luan van
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: hoa sinh sach - thanh ((((trung va) OR (tran van))) OR (truong va)) nhung cong dan toan cao~.
• Adding a wildcard symbol may retrieve word variants: hoa sinh sach - thanh ((((trung va) or (tran van))) or (truong va)) nhung cong dan toan cao*.