Perhaps you should try some spelling variations:
thu nang » thi nang, thu hang, tho nang
thu bang » thu ban, thu hang, chu bang
danh vai » danh sai, danh va, doanh van
su triet » su viet, su tien, ve triet
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
va giao » van giao, va giai, va gia
va danh » va dinh, va dan, va hanh
vai su » va su, van su, lai su

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 nang) or (thu bang)) mai hoi. hieu va giao duc va danh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thu nang) OR (thu bang)) mai hoi. hieu va giao duc va danh vai su triet.
• Adding a wildcard symbol may retrieve word variants: te sach ((thu nang) or (thu bang)) mai hoi. hieu va giao duc va danh vai su triet*.