Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
nang cho » nang chon, ngang cho, nang cao
xuc van » duc van, luc van, vuc van
hieu va » lieu va, hieu qua
sach ty » sach y, sach thu, xach tay
cho hoc » co hoc, khoa hoc
sach tu » sach thu, cach tu, sach uu
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 ((sach ty) OR (sach tu)) nang cho hoc. ((hieu van) or (hieu va)) chat xuc van hanh vi 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 van) OR (hieu va)) chat xuc van hanh vi 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 van) or (hieu va)) chat xuc van hanh vi cua cau*".