Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
toc sach » hoc sach, thuoc sach, nuoc sach
tham tuc » tham thuc, thai tuc, nham thuc
doc sach » hoc sach, nuoc sach, dac sac
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cua triet, dua tren
va tham » van tham, va cham, va thuat
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty xang, ty hang
cuu tre » cau tren, cau treo
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (doc sach)) ty nang cao hoi. hieu va tham tuc va thanh lai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ty nang cao hoi. hieu va tham tuc va thanh lai ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (doc sach)) ty nang cao hoi. hieu va tham tuc va thanh lai ((cua tre) OR (cuu tre))*".