Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
van thanh » ban thanh, van tuan
chat doc » chat hoc, chau doc, thuat doc
tu sach » thu sach, su sach, te sach
cua tre » cuu tre, cua triet, dua tren
doc van » do van, hoc van, duc van
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
ky dang » ky nang, ky danh
ky sang » ky nang, ky tang, duy sang
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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 sang) or (ky dang)) ma hoi. hieu va chat doc van thanh lap ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky sang) OR (ky dang)) ma hoi. hieu va chat doc van thanh lap ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky sang) or (ky dang)) ma hoi. hieu va chat doc van thanh lap ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky sang) or (ky dang)) ma hoi. hieu va chat doc van thanh lap ((cua tre) OR (cua te))*.