Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cua viet » ca viet, hoa viet, cua vat
sach va » sach xa, sach ha, sach dao
va lang » va nang, hoa lang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
hang di » hang doi, hang vi, hang dien
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: thu sach va lang xa hoi. hieu va cam duc va ((hanh vi) or (hang di)) ((cua viet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach va lang xa hoi. hieu va cam duc va ((hanh vi) OR (hang di)) ((cua viet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: thu sach va lang xa hoi. hieu va cam duc va ((hanh vi) or (hang di)) ((cua viet) or (va thiet))*.