Perhaps you should try some spelling variations:
chat hoc » chat hoa, chat thom, cho hoc
van hanh » van thanh, ban hanh, van ban
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cao hoc » co hoc, cho hoc
cac xuc » cam xuc, cac nuoc, chat xuc
van anh » van thanh, tuan anh, van minh
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 nang ((cao hoc) or (chat hoc)). lieu va cac xuc ((van hanh) OR (van anh)) vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((cao hoc) OR (chat hoc)). lieu va cac xuc ((van hanh) OR (van anh)) vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((cao hoc) or (chat hoc)). lieu va cac xuc ((van hanh) OR (van anh)) vi cua cau*".