Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
tu nano » truc nano
nano xa » nano va, nano bac, nano cau
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
sach tu » sach thu, cach tu, sach ty
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
ve cai » va cai, ve tai, ve cau
cua te » cua tu

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 xa hoi. hieu ((ve cai) or (ve cac)) tuc va ((danh vi) OR (dinh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nano xa hoi. hieu ((ve cai) OR (ve cac)) tuc va ((danh vi) OR (dinh vi)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nano xa hoi. hieu ((ve cai) or (ve cac)) tuc va ((danh vi) OR (dinh vi)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach tu nano xa hoi. hieu ((ve cai) or (ve cac)) tuc va ((danh vi) OR (dinh vi)) cua te*.