Perhaps you should try some spelling variations:
thanh vang » thanh van, thanh hoang, thanh giang
thanh hang » thanh hoang, thanh thang, tranh hang
hieu dan » hieu van, sieu dan, hieu dac
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ca qua » cac qua, ca quan, cay qua

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 ky nang ma hoa. hieu dan ((ca qua) OR (cau qua)) ban ((thanh vang) or (thanh hang)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoa. hieu dan ((ca qua) OR (cau qua)) ban ((thanh vang) OR (thanh hang)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoa. hieu dan ((ca qua) OR (cau qua)) ban ((thanh vang) or (thanh hang)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoa. hieu dan ((ca qua) OR (cau qua)) ban ((thanh vang) or (thanh hang)) cua tre*.