Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
tan hanh » tan thanh, tang hanh, toan hanh
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
cua tre » cua te, cuu tre, cua triet

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) or (hoc sach)) ky lang xa hoi. hieu va cac duc tan hanh vi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (hoc sach)) ky lang xa hoi. hieu va cac duc tan hanh vi ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (hoc sach)) ky lang xa hoi. hieu va cac duc tan hanh vi ((cua tre) or (su triet))*.