Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
thanh tung » thanh cong
dung huong » dung thuong, dung phuong, dong huong
doi chieu » doc hieu, doi chi, ho chieu
chan tap » phan tap, chan ta, toan tap
tung cu » tuong cu, dung cu, trung cua
cu dung » su dung, cau duong, duc dung
han tap » han tai, toan tap, nhan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (doi chieu)) sach - thanh tung cu dung huong dan ((chan tap) OR (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doi chieu)) sach - thanh tung cu dung huong dan ((chan tap) OR (han tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (doi chieu)) sach - thanh tung cu dung huong dan ((chan tap) OR (han tap))".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doi chieu)) sach - thanh tung cu dung huong dan ((chan tap) OR (han tap))*.