Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua

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 ky dang xa hoi. hieu va cam ((luc va) or (((tuc xa) or (truc va)))) thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky dang xa hoi. hieu va cam ((luc va) OR (((tuc xa) OR (truc va)))) thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xa hoi. hieu va cam ((luc va) or (((tuc xa) or (truc va)))) thanh vi cua tre*.