Perhaps you should try some spelling variations:
su sach » so sach, vu sach
ve cham » ve chat, vu cham, ve chim
va cham » va chat, va tham
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cuc tre » duc tre, cua tre, cuu tre
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang x hoi. hieu ((ve cham) or (va cham)) truc ((va danh) OR (va hanh)) tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu ((ve cham) OR (va cham)) truc ((va danh) OR (va hanh)) tai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. hieu ((ve cham) or (va cham)) truc ((va danh) OR (va hanh)) tai cuc tre".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu ((ve cham) or (va cham)) truc ((va danh) OR (va hanh)) tai cuc tre*.