Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
sach ty » sach tu, sach thu, xach tay
lang xa » lang ha, dang xay, lang van
va cau » van cau, va cac, va cao
va dau » va dao
xuc va » duc va, tuc va, luc va
vi dau » vi dai, bi dau, ve dau

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 ty) or (sach y)) lang xa hoi. hieu ((va cau) or (va dau)) xuc va thanh vi dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) lang xa hoi. hieu ((va cau) OR (va dau)) xuc va thanh vi dau tren.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) lang xa hoi. hieu ((va cau) or (va dau)) xuc va thanh vi dau tren*.