Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
hieu ly » hieu ky, lieu ly, dieu ly
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
cuu tre » cua tre, cau tren, cau treo
y nang » ly nang, v nang, may nang
ly dat » ly dai, ly dao, ly mat
vi cuu » vi luu, vinh cuu
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 tinh vi 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 tinh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: so sach ((y nang) or (ky nang)) xa hoi. hieu ly dat nuoc va tinh vi cuu tre*.