Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
sach ky » sach y, sach ty, sach kem
cua tre » cua te, cuu tre, cua triet
dang xa » dang xay, lang xa, dang ha
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
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: su ((sach ky) or (sac ky)) dang xa hoi. lieu ((va cam) OR (va cao)) luc va thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) dang xa hoi. lieu ((va cam) OR (va cao)) luc va thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sac ky)) dang xa hoi. lieu ((va cam) OR (va cao)) luc va thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sac ky)) dang xa hoi. lieu ((va cam) OR (va cao)) luc va thanh vi cua tre*.