Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh doi » thanh doi, hanh noi, hang doi
chat tuc » chat xuc, luat tuc, chat huu
hieu va » lieu va, hieu qua
doi cua » dai cua, hoi cua, dong cua
va hanh » van hanh, va thanh, va danh
va chat » van chat, va phat, cao chat
xang xa » lang xa, mang xa, dang xay
ang xa » lang xa, mang xa, dang xay
tuc va » thuc va, truc va, tuc xa
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: ((te sach) or (toc sach)) ty ((xang xa) OR (ang xa)) hoi. hieu va chat tuc va hanh doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty ((xang xa) OR (ang xa)) hoi. hieu va chat tuc va hanh doi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ty ((xang xa) OR (ang xa)) hoi. hieu va chat tuc va hanh doi cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ty ((xang xa) OR (ang xa)) hoi. hieu va chat tuc va hanh doi cua te*.