Perhaps you should try some spelling variations:
chat huu » pham huu
tu sach » thu sach, su sach, te sach
dinh va » dinh van, dinh ve, tinh va
va dinh » van dinh, va kinh, va tinh
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
va cua » va chua, via cua, ca cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((y nang) OR (v nang)) xa hoi. hieu va ((chat huu) or (cam xuc)) va dinh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) xa hoi. hieu va ((chat huu) OR (cam xuc)) va dinh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) OR (v nang)) xa hoi. hieu va ((chat huu) or (cam xuc)) va dinh va cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) OR (v nang)) xa hoi. hieu va ((chat huu) or (cam xuc)) va dinh va cua tre*.