Perhaps you should try some spelling variations:
thanh vi » thanh va, thanh ve, nhanh vi
chat duc » chat xuc, chat doc, chet duoc
cay phoi » cap phoi, tay hoi, cay cho
tu sach » thu sach, su sach, te sach
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
xay hoi » xa hoi, tay hoi, gay thoi
luu tre » luu tru, cuu tre, luy tre

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 ky nang ((xay hoi) or (cay phoi)). hieu va chat duc va ((thanh vi) or (hanh vi)) luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((xay hoi) OR (cay phoi)). hieu va chat duc va ((thanh vi) OR (hanh vi)) luu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((xay hoi) or (cay phoi)). hieu va chat duc va ((thanh vi) or (hanh vi)) luu tre*.