Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
co thuc » do thuc, co thua, mo thuc
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
tu lanh » tu hanh, tu lenh, tu manh
tu lang » cu lang, xu lang, tu quang
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 lang) or (tu lanh)) xa hoi. hieu va co thuc va thanh ((vai cua) OR (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu lang) OR (tu lanh)) xa hoi. hieu va co thuc va thanh ((vai cua) OR (hai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu lang) or (tu lanh)) xa hoi. hieu va co thuc va thanh ((vai cua) OR (hai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu lang) or (tu lanh)) xa hoi. hieu va co thuc va thanh ((vai cua) OR (hai cua)) tre*.