Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau thuc » cau truc, cuu thuc, can thuc
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty nang xa hoi. ((hieu ve) or (hieu qua)) cau thuc va hanh ((vai cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang xa hoi. ((hieu ve) OR (hieu qua)) cau thuc va hanh ((vai cua) OR (lai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. ((hieu ve) or (hieu qua)) cau thuc va hanh ((vai cua) or (lai cua)) tre*.