Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hanh tai » thanh tai, hang tai, han tai
hieu van » hieu va, thien van, lieu va
xuc van » duc van, vuc van, xuc ban
tai cua » thai cua, tai cuc, tri cua
luc van » luoc van, luu van, duc van
van cau » van dau, van hau, van chat
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty hang, ly nang
cua tu » cua tuc, cua su, cua cu

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 ((ty nang) or (ty xang)) cao hoi. hieu van cau ((xuc van) or (luc van)) hanh tai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((ty nang) OR (ty xang)) cao hoi. hieu van cau ((xuc van) OR (luc van)) hanh tai cua tu.
• Adding a wildcard symbol may retrieve word variants: hoc sach ((ty nang) or (ty xang)) cao hoi. hieu van cau ((xuc van) or (luc van)) hanh tai cua tu*.