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