Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang xa » nang x, lang xa, nang ma
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
ca viet » va viet, co viet, hoa viet
ve cam » ve cac, va cam, ve cai
y nang » ky nang, ly nang, v nang
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 nang xa hoi. hieu ((ve cam) or (ve cham)) xuc ((va hanh) OR (va danh)) vi ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang xa hoi. hieu ((ve cam) OR (ve cham)) xuc ((va hanh) OR (va danh)) vi ca viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang xa hoi. hieu ((ve cam) or (ve cham)) xuc ((va hanh) OR (va danh)) vi ca viet".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. hieu ((ve cam) or (ve cham)) xuc ((va hanh) OR (va danh)) vi ca viet*.