Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
ve triet » va trien, su triet
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
cua te » cua tu
xuc va » duc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky sang ma hoi. hieu ve cac ((xuc va) or (tuc va)) hanh vi ((cua te) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky sang ma hoi. hieu ve cac ((xuc va) OR (tuc va)) hanh vi ((cua te) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: hoc sach ky sang ma hoi. hieu ve cac ((xuc va) or (tuc va)) hanh vi ((cua te) or (ve triet))*.