Perhaps you should try some spelling variations:
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
nang cho » nang chon, ngang cho, nang cao
hieu va » lieu va, hieu qua
doi cua » dai cua, hoi cua
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu van
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

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