Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
gian lan » gian lang, gian dan, giang van
sach ky » sac ky, sach y, sach ty
hieu va » hieu qua
xuc van » duc van, vuc van, xuc ban
luc van » luoc van, luu van, duc van
lan cua » lang cua, ban cua, lai cua
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 ky nang x hoi. ((hieu va) or (lieu va)) cac ((xuc van) OR (luc van)) gian lan cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky nang x hoi. ((hieu va) OR (lieu va)) cac ((xuc van) OR (luc van)) gian lan cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky nang x hoi. ((hieu va) or (lieu va)) cac ((xuc van) OR (luc van)) gian lan cua te".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang x hoi. ((hieu va) or (lieu va)) cac ((xuc van) OR (luc van)) gian lan cua te*.