Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
nang mai » nang ma, nang tai, lang mai
sach ky » sac ky, sach ty, sach kem
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
va hieu » van hieu, va dieu, va hien
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
vai va » mai va, dai va, hai va

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 ky) OR (sach y)) nang mai hoi. hieu ve chat ((xuc va) or (luc va)) hanh vai va hieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang mai hoi. hieu ve chat ((xuc va) OR (luc va)) hanh vai va hieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang mai hoi. hieu ve chat ((xuc va) or (luc va)) hanh vai va hieu".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) nang mai hoi. hieu ve chat ((xuc va) or (luc va)) hanh vai va hieu*.