Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nang xa » lang xa, nang ma, mang xa
van bac » van ban, van bao, van hac
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
xuc va » duc va, tuc va, luc va
de cua » le cua, te cua, dieu 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 x)) hoi. hieu van bac xuc va hanh ((vai cua) or (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky ((nang xa) OR (nang x)) hoi. hieu van bac xuc va hanh ((vai cua) OR (de cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu cac ky ((nang xa) or (nang x)) hoi. hieu van bac xuc va hanh ((vai cua) or (de cua)) tre*.