Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh ve, nhanh vi
thanh va » thanh van, hanh va, thanh ha
so sach » so sanh, bo sach, co sach
hieu ly » hieu ky, lieu ly, dieu ly
cuu tre » cua tre, cau tren, cau treo
y nang » ly nang, v nang, may nang
ly dat » ly dai, ly dao, ly mat
nuoc » quoc, duoc, ngoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((y nang) or (ky nang)) xa hoi. hieu ly dat nuoc va ((thanh vi) OR (thanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((y nang) OR (ky nang)) xa hoi. hieu ly dat nuoc va ((thanh vi) OR (thanh va)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((y nang) or (ky nang)) xa hoi. hieu ly dat nuoc va ((thanh vi) OR (thanh va)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: so sach ((y nang) or (ky nang)) xa hoi. hieu ly dat nuoc va ((thanh vi) OR (thanh va)) cuu tre*.