Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
danh doi » danh di, dung doi, danh hoa
tu sach » thu sach, su sach, tu cach
cac tuc » cac toc, cac tu, cac tac
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa

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) or (te sach)) ky tang ma hoi. hieu ve cac tuc xa ((danh doi) OR (thanh doi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky tang ma hoi. hieu ve cac tuc xa ((danh doi) OR (thanh doi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky tang ma hoi. hieu ve cac tuc xa ((danh doi) OR (thanh doi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky tang ma hoi. hieu ve cac tuc xa ((danh doi) OR (thanh doi)) cua tre*.