Perhaps you should try some spelling variations:
dang vat » dang van, dong vat, dang nhat
chat xuc » chat huu, cam xuc, chao xu
su sach » so sach, vu sach
dan vat » van vat, dan va, dan dat
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
xuc cam » phuc cam
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cua su » qua su

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 ky nang xa hoi. hieu va chat xuc cam ((dan vat) or (dang vat)) ((cua tre) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu va chat xuc cam ((dan vat) OR (dang vat)) ((cua tre) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu va chat xuc cam ((dan vat) or (dang vat)) ((cua tre) or (cua su))*.