Perhaps you should try some spelling variations:
tdanh trung » thanh trung, thanh tung, dang trung
nhung huong » nhung phuong, nhung tuong, nhung cong
danh trung » dang trung, dinh trung, manh trung
thieu sach » chieu sach, thien hach, theo sach
hieu cach » hieu cac, chieu sach, hieu ca
dan can » dan chan, dan canh, dan ca
can cau » van cau, ban cau, ca 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) OR (hieu cach)) - ((danh trung) or (tdanh trung)) va nhung huong dan can cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (hieu cach)) - ((danh trung) OR (tdanh trung)) va nhung huong dan can cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (hieu cach)) - ((danh trung) or (tdanh trung)) va nhung huong dan can cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (hieu cach)) - ((danh trung) or (tdanh trung)) va nhung huong dan can cau*.