Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
dai cuu » dai cua, dai huu
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
va chat » van chat, va phat, cao chat
ve cham » va cham, ve chat, vu cham
cuu tre » cua tre, cau tren, cau treo
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: vu sach y nang x hoi. hieu ((ve cham) or (va chat)) doc ((va danh) OR (va dinh)) dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang x hoi. hieu ((ve cham) OR (va chat)) doc ((va danh) OR (va dinh)) dai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang x hoi. hieu ((ve cham) or (va chat)) doc ((va danh) OR (va dinh)) dai cuu tre*".