Perhaps you should try some spelling variations:
xa thanh » va thanh, ha thanh, ta thanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
xa hanh » xa khanh, va hanh, da hanh
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
va am » va lam, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang ma hoa. hieu va am thuc ((xa hanh) OR (xa thanh)) ((vai cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoa. hieu va am thuc ((xa hanh) OR (xa thanh)) ((vai cua) OR (hai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoa. hieu va am thuc ((xa hanh) OR (xa thanh)) ((vai cua) or (hai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoa. hieu va am thuc ((xa hanh) OR (xa thanh)) ((vai cua) or (hai cua)) tre*.