Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sach » chieu sach, thien hach, hieu cach
trung tuan » trung thanh, trung tam, tran tuan
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
bang song » nang song
chinh cau » chinh chau, chinh ca, chinh can
chan cau » phan cau, can cau, nhanh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - thanh trung tuan ((dang cong) or (bang song)) dan ((chan cau) OR (chinh cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh trung tuan ((dang cong) OR (bang song)) dan ((chan cau) OR (chinh cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh trung tuan ((dang cong) or (bang song)) dan ((chan cau) OR (chinh cau))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh trung tuan ((dang cong) or (bang song)) dan ((chan cau) OR (chinh cau))*.