Perhaps you should try some spelling variations:
su sach » so sach, vu sach
tang xa » trang xa, tang ma, lang xa
va hanh » van hanh, va thanh, va danh
sach 7 » sach y, sach 2
7 tang » 6 tang
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
vi cau » ve cau, di cau, viet cau
va cau » van cau, va dau, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach 7 tang xa hoi. hieu ((ve cam) or (va cac)) tuc va hanh ((vi cau) or (va cau)) treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach 7 tang xa hoi. hieu ((ve cam) OR (va cac)) tuc va hanh ((vi cau) OR (va cau)) treo.
• Adding a wildcard symbol may retrieve word variants: su sach 7 tang xa hoi. hieu ((ve cam) or (va cac)) tuc va hanh ((vi cau) or (va cau)) treo*.