Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
xang xa » lang xa, mang xa, ang xa
luc va » tuc va, loc va
ve cam » ve cham, ve cac, va cam

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 xang xa hoi. hieu ve cam ((duc va) or (luc va)) ((hanh tai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty xang xa hoi. hieu ve cam ((duc va) OR (luc va)) ((hanh tai) OR (hanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty xang xa hoi. hieu ve cam ((duc va) or (luc va)) ((hanh tai) or (hanh va)) cua tre*.