Perhaps you should try some spelling variations:
hanh lam » thanh lap, hanh kem, hanh va
thu sach » thuat sach, thuoc sach, thu hoach
va triet » va trien, ve triet, cua triet
thi hanh » thi thanh
lam xuc » cam xuc, lam duoc
dinh ve » dinh ket, dinh van
va dinh » van dinh, va kinh, va tinh
tu sach » su sach, te sach, tu cach
xuc va » duc va, tuc va, luc va
nano 1 » nano o
1 hoi » o hoi, 5 hoi
thiet » thieu

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 (thu sach)) truc nano 1 hoi. thi hanh lam xuc va dinh ve ((va triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) truc nano 1 hoi. thi hanh lam xuc va dinh ve ((va triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) truc nano 1 hoi. thi hanh lam xuc va dinh ve ((va triet) or (va thiet))*.