Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang cho » nang chon, ngang cho, nang cao
hanh vai » hanh vi, hanh va, hanh tai
sach ky » sac ky, sach y, sach ty
cho hoc » co hoc, khoa hoc
hieu ve » hieu va, hieu van
vuc van » duc van, thuc van, chuc van
luc van » luoc van, luu van, duc van
vai cua » dai cua, hai cua, lai cua
cua cau » cua cac, cua chu, cua cay

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang cho hoc. ((hieu ve) or (lieu va)) cac ((vuc van) OR (luc van)) hanh vai cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang cho hoc. ((hieu ve) OR (lieu va)) cac ((vuc van) OR (luc van)) hanh vai cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang cho hoc. ((hieu ve) or (lieu va)) cac ((vuc van) OR (luc van)) hanh vai cua cau*".