Perhaps you should try some spelling variations:
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
van hanh » van thanh, ban hanh, van anh
nang cho » nang chon, ngang cho, nang cao
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
cho hoc » co hoc, khoa hoc
tu nang » tru nang, tu nong, tu nano
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua

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