Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va
cao luc » bao luc, cao duc, cao suc
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va
vi cua » vai cua
di cua » dai cua, doi cua, de 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 sac ky nang ma hoi. ((hieu va) OR (hieu qua)) cao luc va thanh ((vi cua) or (di cua)) vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ma hoi. ((hieu va) OR (hieu qua)) cao luc va thanh ((vi cua) OR (di cua)) vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ma hoi. ((hieu va) OR (hieu qua)) cao luc va thanh ((vi cua) or (di cua)) vat".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ma hoi. ((hieu va) OR (hieu qua)) cao luc va thanh ((vi cua) or (di cua)) vat*.