Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
lang xa » lang ha, dang xay, lang van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
ca viet » va viet, co viet, hoa viet
y lang » o lang, _ lang, tay lang
ve cai » va cai, ve cac, ve tai
xuc va » duc va, tuc va, luc va
vi ca » vit ca, li ca, va ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y lang xa hoi. hieu ((ve cai) or (ve cham)) xuc va hanh vi ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y lang xa hoi. hieu ((ve cai) OR (ve cham)) xuc va hanh vi ca viet.
• Adding a wildcard symbol may retrieve word variants: toc sach y lang xa hoi. hieu ((ve cai) or (ve cham)) xuc va hanh vi ca viet*.