Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
nang cho » nang chon, ngang cho, nang cao
hanh di » hanh vi, hanh de, hang di
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
cua cau » cua cac, cua chu, cua cay
sach ty » sach y, sach thu, xach tay
hieu ve » hieu va
cho hoc » co hoc, khoa hoc
sach tu » sach thu, cach tu, sach uu
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: te ((sach ty) OR (sach tu)) nang cho hoc. ((hieu ve) or (hieu van)) cac xuc van hanh di cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach tu)) nang cho hoc. ((hieu ve) OR (hieu van)) cac xuc van hanh di cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach tu)) nang cho hoc. ((hieu ve) or (hieu van)) cac xuc van hanh di cua cau*".