Perhaps you should try some spelling variations:
sach ky » sach y, sach ty, sach kem
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac
xuc va » tuc va, luc va, xac va
vi cua » vai cua, di cua
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: thu ((sach ky) OR (sac ky)) nang ma hoi. hieu ve cac ((xuc va) or (duc va)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sac ky)) nang ma hoi. hieu ve cac ((xuc va) OR (duc va)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sac ky)) nang ma hoi. hieu ve cac ((xuc va) or (duc va)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) OR (sac ky)) nang ma hoi. hieu ve cac ((xuc va) or (duc va)) hanh vi cua te*.