Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
nang cho » nang chon, ngang cho, nang cao
hieu van » hieu va, thien van, lieu va
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
sach ty » sach y, sach tu, sach thu
van cac » van hac, van cau, van bac
cho hoc » co hoc, khoa hoc
ty nang » ky nang, ty xang, ty hang
cua cau » cua cac, cua chu, cua cay
anh vi » hanh vi, anh ve, anh vu
anh va » hanh va

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 cho hoc. hieu van cac ((xuc van) or (duc van)) ((anh vi) OR (anh va)) cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty nang cho hoc. hieu van cac ((xuc van) OR (duc van)) ((anh vi) OR (anh va)) cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ty nang cho hoc. hieu van cac ((xuc van) or (duc van)) ((anh vi) OR (anh va)) cua cau*".