Perhaps you should try some spelling variations:
truc ban » thuc ban, truc dan, truc van
ban hang » ngan hang
tu sach » thu sach, su sach, te sach
tang xa » trang xa, tang ma, lang xa
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
sach 6 » sach y, sach 2
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach 6 tang xa hoi. hieu ((ve cam) or (ve cac)) truc ban hang va ((cuu tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach 6 tang xa hoi. hieu ((ve cam) OR (ve cac)) truc ban hang va ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach 6 tang xa hoi. hieu ((ve cam) or (ve cac)) truc ban hang va ((cuu tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach 6 tang xa hoi. hieu ((ve cam) or (ve cac)) truc ban hang va ((cuu tre) OR (cua tre))*.