Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
va triet » va trien, ve triet, cua triet
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
cua te » cua tu
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: toc sach y nang ma hoi. hieu ve cac xuc va hanh vi ((cua te) or (((va triet) or (va thiet))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ma hoi. hieu ve cac xuc va hanh vi ((cua te) OR (((va triet) OR (va thiet)))).
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ma hoi. hieu ve cac xuc va hanh vi ((cua te) or (((va triet) or (va thiet))))*.