Perhaps you should try some spelling variations:
thanh vi » thanh va, thanh ve, nhanh vi
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
cam luc » cam xuc, cau luc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
luc va » duc va, tuc va, loc va
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho

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) OR (thu sach)) y nang x hoi. hieu ve cam luc va ((thanh vi) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang x hoi. hieu ve cam luc va ((thanh vi) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) y nang x hoi. hieu ve cam luc va ((thanh vi) or (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) y nang x hoi. hieu ve cam luc va ((thanh vi) or (hanh vi)) cua tre*.