Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang van » dang van, lang van, nong van
tang van » dang van, hoang van, trong van
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
nam tuc » nam thuc, nam truc, nam tu
va hanh » va thanh, va danh, ban hanh
va nam » van nam, ha nam, va nay
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: su sach ty ((nang van) or (tang van)) hoi. lieu va nam tuc ((va hanh) OR (van hanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang van) OR (tang van)) hoi. lieu va nam tuc ((va hanh) OR (van hanh)) vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang van) or (tang van)) hoi. lieu va nam tuc ((va hanh) OR (van hanh)) vi cua triet*".