Perhaps you should try some spelling variations:
thanh trung » thanh tung
phuong dan » phuong danh, phuong doan, huong dan
trung vap » trung cap, trung va, trung van
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
vap bang » lap bang, va bang, cap bang
phan cau » phan dau, phan cac, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - thanh trung vap bang phuong dan ((phan cau) OR (phan tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - thanh trung vap bang phuong dan ((phan cau) OR (phan tu))".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - thanh trung vap bang phuong dan ((phan cau) OR (phan tu))*.