Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cao tuc » dao tuc, cao duc, cao suc
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
va cao » va cac, va co, va dao
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua
x hoi » xa hoi, o hoi, x ho

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 v nang x hoi. lieu va cao tuc ((va danh) OR (va dinh)) ((di cua) or (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach v nang x hoi. lieu va cao tuc ((va danh) OR (va dinh)) ((di cua) OR (de cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach v nang x hoi. lieu va cao tuc ((va danh) OR (va dinh)) ((di cua) or (de cua)) tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach v nang x hoi. lieu va cao tuc ((va danh) OR (va dinh)) ((di cua) or (de cua)) tre*.