Perhaps you should try some spelling variations:
sach han » sach tham, sach danh, sach nang
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
sach ha » sach nha, sach xa, bach ha
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, xuc ban
va cam » va cham, va cac, va cao
kien » bien, vien, tien

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 han) or (sach ha)) nang xa hoi. hieu va cam xuc van hanh vi ((su triet) or (su kien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach han) OR (sach ha)) nang xa hoi. hieu va cam xuc van hanh vi ((su triet) OR (su kien)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach han) or (sach ha)) nang xa hoi. hieu va cam xuc van hanh vi ((su triet) or (su kien))*.