Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
hanh van » thanh van, khanh van, hanh va
so sach » so sanh, bo sach, co sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
ve cac » va cac, vien cac
cac so » cac co, cac bo, cac ho
so van » su van, vo van

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach o lang xa hoi. hieu ve cac so van ((((hanh tai) OR (hanh van))) OR (hanh vi)) cua tre~.
• Adding a wildcard symbol may retrieve word variants: so sach o lang xa hoi. hieu ve cac so van ((((hanh tai) or (hanh van))) or (hanh vi)) cua tre*.