Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cau tren » cu tren, dau tren, ca tren
thanh vi » hanh vi, thanh va, thanh ve
lang van » dang van, tang van, hoang van
tuc van » thuc van, truc van, tuc va
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, dang xay
sach 7 » sach y, sach 2
ve cac » va cac, vien cac
vi cau » va cau, ve cau, di cau
ve cam » ve cham, va cam, ve cai

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

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