Perhaps you should try some spelling variations:
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
dong xa » dong xay, duong xa, dong va
dong ha » dong hoa, dong va, dong hoc
hieu va » lieu va, hieu qua
co thuc » do thuc, co thua, mo thuc
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vai cua » hai cua, lai cua, bai cua
va co » vo co

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 tu ((dong xa) OR (dong ha)) hoi. hieu va co thuc va hanh ((vai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ((dong xa) OR (dong ha)) hoi. hieu va co thuc va hanh ((vai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu ((dong xa) OR (dong ha)) hoi. hieu va co thuc va hanh ((vai cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach tu ((dong xa) OR (dong ha)) hoi. hieu va co thuc va hanh ((vai cua) or (dai cua)) tre*.