Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
ve cam » ve cham, ve cac, ve cai
va cai » va cac, va bai, va dai
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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 ma hoa. hieu ((((ve cam) or (va cai))) or (va cam)) luc va thanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoa. hieu ((((ve cam) OR (va cai))) OR (va cam)) luc va thanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoa. hieu ((((ve cam) or (va cai))) or (va cam)) luc va thanh vi cua vat*.