Perhaps you should try some spelling variations:
van chat » cao chat
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
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, chat hoc
van cac » van hac, van cau, van bac
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. hieu ((van cac) or (van chat)) xuc ((van hanh) OR (ban hanh)) vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang cao hoc. hieu ((van cac) OR (van chat)) xuc ((van hanh) OR (ban hanh)) vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang cao hoc. hieu ((van cac) or (van chat)) xuc ((van hanh) OR (ban hanh)) vi cua cau*".