Perhaps you should try some spelling variations:
cac truc » cau truc, cac tru, cac trung
thai cua » than cua, tai cuc, tri cua
su sach » so sach
vu sach » vu bach, vu khach
nang xa » nang x, lang xa, nang ma
truc va » thuc va, thuc vat, trung va
va dinh » van dinh, va kinh, va tinh
hai cua » dai cua, hoi cua, lai cua

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 ((hai cua) OR (thai 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 ((hai cua) OR (thai 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 ((hai cua) OR (thai 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 ((hai cua) OR (thai cua)) tre*.