Perhaps you should try some spelling variations:
kinh sach » sinh sach, dinh sach, tinh sach
truong va » truong dai, truong cao, truong dao
hang cong » dang cong, hang nong, bang cong
hoc kinh » hoc sinh, luoc kinh
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
tung va » trung va, tuong va, dung va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc kinh sach - thanh ((tung va) or (truong va)) hang cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kinh sach - thanh ((tung va) OR (truong va)) hang cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc kinh sach - thanh ((tung va) or (truong va)) hang cong dan toan cao*.