Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nang cho » nang chon, ngang cho, sang cho
van hanh » van thanh, ban hanh, van anh
sach thi » sach thu, sach tai, sach thieu
cac xuc » cam xuc, cac nuoc, chat xuc
hanh di » hanh vi, hanh de, hang di
xuc van » duc van, luc van, vuc van
cua cau » cua cac, cua chu, cua cay
hieu va » lieu va, hieu qua
hieu ve » hieu van
di cua » dai cua, doi cua, de 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 thi ((nang cho) OR (nang cao)) hoc. ((hieu ve) or (hieu va)) cac xuc van hanh di cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thi ((nang cho) OR (nang cao)) hoc. ((hieu ve) OR (hieu va)) cac xuc van hanh di cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach thi ((nang cho) OR (nang cao)) hoc. ((hieu ve) or (hieu va)) cac xuc van hanh di cua cau*".