Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
cau thuc » cau truc, cuu thuc, can thuc
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va cau » van cau, va cac, va dau
di cua » doi cua, do cua, da cua
de cua » le cua, te cua, dieu cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach ky nang x hoi. hieu va cau thuc van hanh ((((di cua) or (de cua))) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ky nang x hoi. hieu va cau thuc van hanh ((((di cua) OR (de cua))) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: nuoc sach ky nang x hoi. hieu va cau thuc van hanh ((((di cua) or (de cua))) or (dai cua)) tre*.