Perhaps you should try some spelling variations:
thien van » thi van
va triet » va thiet, va trien, ve triet
lang van » dang van, tang van, hoang van
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
dau duc » dao duc, dang duc, dau nuoc
van dau » van dao, phan dau
tu sach » thu sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) ky ((nang xa) or (lang van)) hoi. thien van dau duc va hanh va va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky ((nang xa) OR (lang van)) hoi. thien van dau duc va hanh va va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky ((nang xa) or (lang van)) hoi. thien van dau duc va hanh va va triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky ((nang xa) or (lang van)) hoi. thien van dau duc va hanh va va triet*.