Perhaps you should try some spelling variations:
tan doanh » toan doanh, van doanh, san doanh
tham duc » pham duc, tham du, than duc
lang xa » dang xay, lang van
lang ha » long ha
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
buu tre » cuu tre
te cac » ve cac, te cao, de cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te cac) OR (tu cac)) ky ((lang xa) or (lang ha)) hoi. hieu va tham duc tan doanh tai buu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (tu cac)) ky ((lang xa) OR (lang ha)) hoi. hieu va tham duc tan doanh tai buu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cac) OR (tu cac)) ky ((lang xa) or (lang ha)) hoi. hieu va tham duc tan doanh tai buu tre".
• Adding a wildcard symbol may retrieve word variants: ((te cac) OR (tu cac)) ky ((lang xa) or (lang ha)) hoi. hieu va tham duc tan doanh tai buu tre*.