Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
danh dai » danh dau, danh di, danh sai
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
cua te » cua tu

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 ((lang xa) or (nang x)) hoi. ((hieu van) OR (hieu va)) cac hop va danh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((lang xa) OR (nang x)) hoi. ((hieu van) OR (hieu va)) cac hop va danh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((lang xa) or (nang x)) hoi. ((hieu van) OR (hieu va)) cac hop va danh dai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((lang xa) or (nang x)) hoi. ((hieu van) OR (hieu va)) cac hop va danh dai cua te*.