Perhaps you should try some spelling variations:
thai cua » than cua, tai cuc, tri cua
thu sach » tu sach, thuat sach, thuoc sach
cam thuc » am thuc, nam thuc, cam thu
vu sach » vu bach, su sach, vu khach
hai cua » dai cua, hoi cua, lai cua
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
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: ((vu sach) or (thu sach)) ty xang xa hoi. hieu va cam thuc va danh ((hai cua) OR (thai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (thu sach)) ty xang xa hoi. hieu va cam thuc va danh ((hai cua) OR (thai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (thu sach)) ty xang xa hoi. hieu va cam thuc va danh ((hai cua) OR (thai cua)) te".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (thu sach)) ty xang xa hoi. hieu va cam thuc va danh ((hai cua) OR (thai cua)) te*.