Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cua triet, dua tren
va danh » va dinh, va dan, dia danh
cuu tre » cau tren, cau treo
va hanh » van hanh, va thanh, ban hanh
cac thu » cach thuc, cac thoi
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma

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