Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
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: tu sach ty ((nang xa) or (lang ha)) hoi. hieu ((ve cham) or (va cac)) luc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (lang ha)) hoi. hieu ((ve cham) OR (va cac)) luc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (lang ha)) hoi. hieu ((ve cham) or (va cac)) luc va hanh vi cua tre*.