Perhaps you should try some spelling variations:
su sach » so sach
vu sach » vu bach, vu khach
truc va » thuc va, thuc vat, trung va
va kinh » va tinh, qua kinh
hai cua » thai cua, dai cua, lai cua
hoi cua » hoi chuc
va cau » van cau, va cac, va dau
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: ((su sach) or (vu sach)) ky nang x hoi. lieu va cau truc va kinh ((hai cua) OR (hoi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang x hoi. lieu va cau truc va kinh ((hai cua) OR (hoi cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky nang x hoi. lieu va cau truc va kinh ((hai cua) OR (hoi cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang x hoi. lieu va cau truc va kinh ((hai cua) OR (hoi cua)) tre*.