Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
dong hoa » dong hoc, dong co
van hanh » van thanh, ban hanh, van anh
sach thu » sach thue, sach thieu, sach tham
te sach » toc sach
bai cua » ban cua, bai ca, hai cua
hieu va » lieu va, hieu qua
co thuc » do thuc, co thua, mo thuc
dong ha » dong va, dong hoc, dong tai
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 thu ((dong ha) OR (dong hoa)) hoi. hieu va co thuc van hanh ((bai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu ((dong ha) OR (dong hoa)) hoi. hieu va co thuc van hanh ((bai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thu ((dong ha) OR (dong hoa)) hoi. hieu va co thuc van hanh ((bai cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach thu ((dong ha) OR (dong hoa)) hoi. hieu va co thuc van hanh ((bai cua) or (dai cua)) tre*.