Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
thanh vi » hanh vi, thanh ve, nhanh vi
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach ty
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, ve cai

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 cam)) luc va ((thanh vi) OR (thanh va)) 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 cam)) luc va ((thanh vi) OR (thanh va)) cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoa. hieu ((ve cam) or (va cam)) luc va ((thanh vi) OR (thanh va)) cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoa. hieu ((ve cam) or (va cam)) luc va ((thanh vi) OR (thanh va)) cua vat*.