Perhaps you should try some spelling variations:
thuc ban » thuoc ban, thuc dan, thu ban
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
ve cham » va cham, ve chat, vu cham
luu tre » luu tru, cuu tre, luy tre
y lang » o lang, _ lang, tay lang
ve cam » va cam, ve cai, ve cau
ve cac » va cac, vien cac
vi luu » vi lua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu ((((ve cam) OR (ve cham))) OR (ve cac)) thuc ban hanh vi luu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. hieu ((((ve cam) OR (ve cham))) or (ve cac)) thuc ban hanh vi luu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu ((((ve cam) OR (ve cham))) or (ve cac)) thuc ban hanh vi luu tre*.