Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va
cam tuc » cam xuc, cam tu, nam thuc
xa hanh » xa thanh, xa khanh, va hanh
ve cau » ke cau, ve cac, le cau
va cau » van cau, va cac, va dau
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: thu sach ky nang x hoi. ((hieu va) or (hieu qua)) cam tuc xa hanh ((ve cau) OR (va cau)) theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. ((hieu va) OR (hieu qua)) cam tuc xa hanh ((ve cau) OR (va cau)) theo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang x hoi. ((hieu va) or (hieu qua)) cam tuc xa hanh ((ve cau) OR (va cau)) theo".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. ((hieu va) or (hieu qua)) cam tuc xa hanh ((ve cau) OR (va cau)) theo*.