Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va tinh » may tinh
nang xa » nang x, lang xa, nang ma
doi cua » dai cua, hoi cua
doi cuu » doi cuoc
va hanh » van hanh, va thanh, va danh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ho duc » hoc duc, do duc, hong duc
van ho » van hoa, van hoc, van hoe

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 xa hoi. hieu van ho duc ((va hanh) or (va tinh)) ((doi cuu) OR (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. hieu van ho duc ((va hanh) OR (va tinh)) ((doi cuu) OR (doi cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. hieu van ho duc ((va hanh) or (va tinh)) ((doi cuu) OR (doi cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. hieu van ho duc ((va hanh) or (va tinh)) ((doi cuu) OR (doi cua)) tre*.