Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc anh
dinh ban » dinh bang, dinh ba, sinh ban
hoc cac » hoc cao
ty nang » ky nang, ty xang, ty hang
cam tuc » cam xuc, cam tu, nam thuc
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
cua te » cua tu
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) or (hoc cac)) ty nang x hoi. lieu va cam tuc va ((dinh ban) OR (dinh van)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cac)) ty nang x hoi. lieu va cam tuc va ((dinh ban) OR (dinh van)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (hoc cac)) ty nang x hoi. lieu va cam tuc va ((dinh ban) OR (dinh van)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (hoc cac)) ty nang x hoi. lieu va cam tuc va ((dinh ban) OR (dinh van)) cua te*.