Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
ban hang » ngan hang
van hanh » van thanh, ban hanh, van anh
cac xuc » cam xuc, cac nuoc, chat xuc
cua cau » cua cac, cua chu, cua cay
hieu ve » hieu va, hieu van
cao hoc » co hoc, cho hoc, chat hoc
tu nang » tru nang, tu nong, tu nano
vi cua » vai cua, di cua
ve cac » va cac, vien cac

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