Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
va cham » va chat, va tham
dinh vi » dinh ve, dinh viet, dinh tri
va dinh » van dinh, va kinh, va tinh
sach ty » sach y, sach tu, xach tay
lang xa » lang ha, dang xay, lang van
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) or (sach thu)) lang xa hoi. hieu ((va cham) or (va cac)) xuc va dinh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) lang xa hoi. hieu ((va cham) OR (va cac)) xuc va dinh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach thu)) lang xa hoi. hieu ((va cham) or (va cac)) xuc va dinh vi cua vat*.