Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
dien sach » dien anh
kien sach » kien mac, viet sach, kien lich
trong van » trong cac
dong cong » duong cong, dung cong, dang cong
cong dan » cong san, cong tan, huong dan
dan thai » dang thai, dan thi, dan than
thai cao » tai cao, thoai cac, thuat cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((kien sach) or (vien bach))) or (dien sach)) - thanh trong van dong cong dan thai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((kien sach) OR (vien bach))) OR (dien sach)) - thanh trong van dong cong dan thai cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((((kien sach) or (vien bach))) or (dien sach)) - thanh trong van dong cong dan thai cao*.