Perhaps you should try some spelling variations:
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 vanh » va danh, va hanh, va anh
than va » thanh va, nhan va, toan va
va cam » va cham, va cac, va cao
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 cam xuc ((va vanh) or (va van)) than va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu va cam xuc ((va vanh) OR (va van)) than va thiet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu va cam xuc ((va vanh) or (va van)) than va thiet*.