Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, cach thuc
sach tham » sach nha
ve triet » va trien, su triet
trong xa » trong xay, trong ca, trong xu
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach thue) OR (sach tham)) trong xa hoi. hieu va cam tuc va hanh vi ((cua tre) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thue) OR (sach tham)) trong xa hoi. hieu va cam tuc va hanh vi ((cua tre) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach thue) OR (sach tham)) trong xa hoi. hieu va cam tuc va hanh vi ((cua tre) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: su ((sach thue) OR (sach tham)) trong xa hoi. hieu va cam tuc va hanh vi ((cua tre) or (ve triet))*.