Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
bai triet » bai viet, tai thiet, va triet
va doanh » van doanh, vay doanh, va danh
ly doanh » ly anh
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
dau luc » cau luc, dau luan, dau nuoc
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang xa hoi. hieu va dau luc ((va doanh) or (ly doanh)) va bai triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang xa hoi. hieu va dau luc ((va doanh) OR (ly doanh)) va bai triet.
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang xa hoi. hieu va dau luc ((va doanh) or (ly doanh)) va bai triet*.