Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
dinh vi » dinh viet, dinh tri, dinh thi
dinh ve » dinh ket, dinh van
y nano » day nano
_ nano » _ nao
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
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: hoc sach ((y nano) or (_ nano)) xa hoi. hieu ve cam tuc va ((dinh vi) OR (dinh ve)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((y nano) OR (_ nano)) xa hoi. hieu ve cam tuc va ((dinh vi) OR (dinh ve)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((y nano) or (_ nano)) xa hoi. hieu ve cam tuc va ((dinh vi) OR (dinh ve)) cua te".
• Adding a wildcard symbol may retrieve word variants: hoc sach ((y nano) or (_ nano)) xa hoi. hieu ve cam tuc va ((dinh vi) OR (dinh ve)) cua te*.