Perhaps you should try some spelling variations:
sach truc » cach thuc, sach tren, sach thu
tu sach » thu sach, su sach, te sach
thi van » thi lan, thi hanh, thi nang
lam xuc » lam duoc
va kinh » qua kinh
va tinh » may tinh
nano x » nano 1, nano o
vu va » vu van, tu va, su va
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 truc nano x ho. thi van ((lam xuc) OR (cam xuc)) ((va kinh) or (va tinh)) vu va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach truc nano x ho. thi van ((lam xuc) OR (cam xuc)) ((va kinh) OR (va tinh)) vu va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach truc nano x ho. thi van ((lam xuc) OR (cam xuc)) ((va kinh) or (va tinh)) vu va thiet".
• Adding a wildcard symbol may retrieve word variants: tu sach truc nano x ho. thi van ((lam xuc) OR (cam xuc)) ((va kinh) or (va tinh)) vu va thiet*.