Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
dan vai » dan va, dan tai, dan vat
cua tre » cuu tre, cua triet, dua tren
ky anh » ky danh, ly anh, ty anh
ve cam » ve cham, ve cac, va cam
va dan » ca dan, va dao, va dau
cua te » cua tu

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

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