Perhaps you should try some spelling variations:
thanh tai » thanh toan, doanh tai, thanh san
thanh hai » thanh phan, thanh hoa, thanh san
su sach » vu sach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
ve cap » ve cac, le cap, ve cai
cuu va » cuu van, cuu ve

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) or (so sach)) ty nang ma hoi. hieu ve cap cuu va ((thanh hai) or (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ty nang ma hoi. hieu ve cap cuu va ((thanh hai) OR (thanh tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ty nang ma hoi. hieu ve cap cuu va ((thanh hai) or (thanh tai)) cua tre*.