Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
vi 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 cac ky ((nang xa) OR (nang ma)) hoi. hieu ve cam tuc va hanh ((vi cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky ((nang xa) OR (nang ma)) hoi. hieu ve cam tuc va hanh ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky ((nang xa) OR (nang ma)) hoi. hieu ve cam tuc va hanh ((vi cua) or (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky ((nang xa) OR (nang ma)) hoi. hieu ve cam tuc va hanh ((vi cua) or (vai cua)) tre*.