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
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac
cac lo » cac lop, cac co, cac bo
lo van » le van, vo van, so van

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang ma hoi. hieu ve cac lo van ((((hanh tai) or (hanh van))) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang ma hoi. hieu ve cac lo van ((((hanh tai) OR (hanh van))) OR (hanh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach y nang ma hoi. hieu ve cac lo van ((((hanh tai) or (hanh van))) or (hanh vi)) cua tre*.