Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chao xu
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
van han » van hanh, van phan, van nhan
va han » va phan, va hanh, va hang
thiet » thieu

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 xa hoi. hieu va chat xuc ((va han) OR (van han)) tri va thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu va chat xuc ((va han) OR (van han)) tri va thiet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu va chat xuc ((va han) OR (van han)) tri va thiet*.