Perhaps you should try some spelling variations:
phuc cam » phan cam, phuc co, phuc cua
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
dan vai » dan va, dan tai, dan vat
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
ve cac » va cac, vien cac

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 ((ty nang) OR (ty hang)) xa hoi. hieu ve cac ((xuc cam) or (phuc cam)) dan vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty hang)) xa hoi. hieu ve cac ((xuc cam) OR (phuc cam)) dan vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ty hang)) xa hoi. hieu ve cac ((xuc cam) or (phuc cam)) dan vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) OR (ty hang)) xa hoi. hieu ve cac ((xuc cam) or (phuc cam)) dan vai cua tre*.