Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
cau tren » cu tren, dau tren, ca tren
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
hanh ve » hanh vi, hanh va, hanh kem
co hoi » co hoc
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
ve cau » ke cau, va cau, le cau

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ky nang ((co hoi) OR (co loi)). hieu ve cac tuc va hanh ve cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuat sach)) ky nang ((co hoi) OR (co loi)). hieu ve cac tuc va hanh ve cau tren~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat sach)) ky nang ((co hoi) OR (co loi)). hieu ve cac tuc va hanh ve cau tren*.