Perhaps you should try some spelling variations:
cac truc » cau truc, cac tru, cac trung
van dinh » van minh, van dich, xuan dinh
su sach » so sach
vu sach » vu bach, vu khach
nang xa » nang x, lang xa, nang ma
va dinh » va kinh, va tinh, vu dinh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet

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