Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chiet tach, chieu sang, chieu xanh
thong cong » trong cong, tong cong, thong thong
trung ha » trung hoc, trung tam, trung cap
ha thong » hoa thong, nha thong, he thong
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (chinh sach)) - thanh trung ha thong cong dan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chinh sach)) - thanh trung ha thong cong dan phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chinh sach)) - thanh trung ha thong cong dan phan dau*.