Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
tan thanh » tran thanh, tang thanh, toan thanh
sach duy » sach dung, sach duoc, sach dao
duy nang » dun nang, duy nong, duy sang
tu sach » thu sach, su sach, te sach
dat cuu » dat cau, dat cua
va tham » van tham, va thanh, va thuat
va cham » va chat
mai hoi » mai khoi, dai hoi, lai hoi
cuu tre » cua tre, cau tren, cau treo
ma hoi » xa hoi, ma hoa, me hoi

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 duy nang ((ma hoi) or (mai hoi)). hieu ((va cham) OR (va tham)) duc tan thanh dat cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach duy nang ((ma hoi) OR (mai hoi)). hieu ((va cham) OR (va tham)) duc tan thanh dat cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach duy nang ((ma hoi) or (mai hoi)). hieu ((va cham) OR (va tham)) duc tan thanh dat cuu tre*".