Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac

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 ky nang xa hoi. hieu ((ve cam) or (ve cac)) thuc ((va danh) OR (va hanh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. hieu ((ve cam) OR (ve cac)) thuc ((va danh) OR (va hanh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. hieu ((ve cam) or (ve cac)) thuc ((va danh) OR (va hanh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. hieu ((ve cam) or (ve cac)) thuc ((va danh) OR (va hanh)) dai cua tre*.