Perhaps you should try some spelling variations:
chat xuc » chat huu, chao xu, chat cua
hieu van » hieu va, thien van, lieu va
dinh va » dinh van, dinh ve, tinh va
va dinh » van dinh, va kinh, va tinh
su sach » so sach
vu sach » vu bach, vu khach
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
va cua » va chua, via cua, ca cua
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)) y nang x hoi. hieu van ((chat xuc) OR (cam xuc)) va dinh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y nang x hoi. hieu van ((chat xuc) OR (cam xuc)) va dinh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) y nang x hoi. hieu van ((chat xuc) OR (cam xuc)) va dinh va cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) y nang x hoi. hieu van ((chat xuc) OR (cam xuc)) va dinh va cua tre*.