Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
sach ky » sac ky, sach y, sach ty
luc va » duc va, tuc va, loc va
xuc va » duc va, tuc va, xac va
vi cua » vai cua, di cua
va dao » ca dao
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 ky nang mai hoi. hieu ((ve cac) or (va dao)) ((xuc va) or (luc va)) hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang mai hoi. hieu ((ve cac) OR (va dao)) ((xuc va) OR (luc va)) hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang mai hoi. hieu ((ve cac) or (va dao)) ((xuc va) or (luc va)) hanh vi cua vat*.