Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
vu cham » va cham, tu cham, qua cham
hanh di » hanh vi, hanh de, hang di
sac van » cac van, san van, sat van
vu kham » vu khanh
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
ve cham » va cham, ve chat, ve chim
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
di cua » dai cua, doi cua, de 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 ty lang xa hoi. hieu ((ve cham) or (((vu cham) OR (vu kham)))) sac van hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty lang xa hoi. hieu ((ve cham) OR (((vu cham) OR (vu kham)))) sac van hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty lang xa hoi. hieu ((ve cham) or (((vu cham) OR (vu kham)))) sac van hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty lang xa hoi. hieu ((ve cham) or (((vu cham) OR (vu kham)))) sac van hanh di cua tre*.