Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, xuc ban
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
ca viet » va viet, co viet, hoa viet
ve cac » va cac, vien cac
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: thuoc sach ky ((nang xa) OR (lang xa)) hoi. hieu ((ve cham) or (ve cac)) xuc van hanh vi ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky ((nang xa) OR (lang xa)) hoi. hieu ((ve cham) OR (ve cac)) xuc van hanh vi ca viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky ((nang xa) OR (lang xa)) hoi. hieu ((ve cham) or (ve cac)) xuc van hanh vi ca viet".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky ((nang xa) OR (lang xa)) hoi. hieu ((ve cham) or (ve cac)) xuc van hanh vi ca viet*.