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
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
tu nano » truc nano
tu nang » tru nang, tu nong, tu lang
luc va » duc va, tuc va, loc va
lam ve » la ve, lam vu, nam ve

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 ((tu nang) OR (tu nano)) xa hoi. ((hieu ve) or (hieu va)) cam luc va hanh lam ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tu nang) OR (tu nano)) xa hoi. ((hieu ve) OR (hieu va)) cam luc va hanh lam ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tu nang) OR (tu nano)) xa hoi. ((hieu ve) or (hieu va)) cam luc va hanh lam ve triet*".