Perhaps you should try some spelling variations:
chay tren » thai tren, ca tren, cau tren
chau tre » chau tho, cho tre, cau tra
dinh lai » dinh lam, dinh lap, dinh tai
xang xa » lang xa, mang xa, ang xa
sach tu » sach thu, cach tu, sach uu
sach ty » sach y, sach thu, xach tay
cam duc » cam xuc, cao duc, pham duc
va dinh » van dinh, va kinh, va tinh
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao

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 ty) OR (sach tu)) xang xa hoi. hieu va cam duc va dinh lai ((chau tre) or (chay tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach tu)) xang xa hoi. hieu va cam duc va dinh lai ((chau tre) OR (chay tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ty) OR (sach tu)) xang xa hoi. hieu va cam duc va dinh lai ((chau tre) or (chay tren))*".