Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
hanh lam » hanh kem, hanh va, dinh lam
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
cua tre » cua te, cuu tre, cua triet
tu nano » truc nano
ve cam » ve cham, va cam, ve cai
nano x » nano 1, nano o
ve cac » va cac, vien cac

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 nano x ho. hieu ((ve cam) OR (ve cac)) duc va ((thanh lap) or (hanh lam)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nano x ho. hieu ((ve cam) OR (ve cac)) duc va ((thanh lap) OR (hanh lam)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nano x ho. hieu ((ve cam) OR (ve cac)) duc va ((thanh lap) or (hanh lam)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach tu nano x ho. hieu ((ve cam) OR (ve cac)) duc va ((thanh lap) or (hanh lam)) cua tre*.