Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh lam » thanh lap, hanh kem, hanh va
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
le nam » ly nam, he nam, le na
lam ve » la ve, lam vu, nam ve
ve nam » he nam, va nam, te nam

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 ((thi hanh) or (thi thanh)) xa hoi. hieu ((ve nam) OR (le nam)) thuc va hanh lam ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thi hanh) OR (thi thanh)) xa hoi. hieu ((ve nam) OR (le nam)) thuc va hanh lam ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((thi hanh) or (thi thanh)) xa hoi. hieu ((ve nam) OR (le nam)) thuc va hanh lam ve triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((thi hanh) or (thi thanh)) xa hoi. hieu ((ve nam) OR (le nam)) thuc va hanh lam ve triet*.