Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, ve cac, le cau
va cau » van cau, va cac, va dau
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca cua

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 ky lang xa hoi. hieu ((ve cau) OR (va cau)) luc va thanh va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky lang xa hoi. hieu ((ve cau) OR (va cau)) luc va thanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang xa hoi. hieu ((ve cau) OR (va cau)) luc va thanh va cua tre*.