Perhaps you should try some spelling variations:
nang doc » nang luc
va doanh » van doanh, vay doanh, hoa doanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
doc loi » duc loi
va danh » va dinh, va dan, va hanh
tai cua » thai cua, tai cuc, tri cua
cua te » cua tu

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 doc loi. hieu ((van lam) or (van nam)) duc ((va doanh) OR (va danh)) tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang doc loi. hieu ((van lam) OR (van nam)) duc ((va doanh) OR (va danh)) tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang doc loi. hieu ((van lam) or (van nam)) duc ((va doanh) OR (va danh)) tai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang doc loi. hieu ((van lam) or (van nam)) duc ((va doanh) OR (va danh)) tai cua te*.