Perhaps you should try some spelling variations:
thu hang » thi hang, thu huong, thu trang
danh vai » danh sai, danh va, doanh van
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
va cai » va bai, va dai, va cao
va hoc » van hoc
cua te » cua tu

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 ((thu hang) OR (thuc hanh)) va hoc. hieu ((va cai) or (va cac)) duc va danh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thu hang) OR (thuc hanh)) va hoc. hieu ((va cai) OR (va cac)) duc va danh vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thu hang) OR (thuc hanh)) va hoc. hieu ((va cai) or (va cac)) duc va danh vai cua te*".