Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
cua viet » ca viet, hoa viet, cua vat
thanh di » thanh doi, thanh de, thanh do
va cham » va chat, va tham
toan ky » than ky, toan ly, toan ke
lang ha » long ha
lang xa » dang xay, lang van
di cua » dai cua, doi cua, de cua
va cam » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat toan ky ((lang xa) or (lang ha)) hoi. hieu ((va cam) or (va cham)) thuc vat thanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat toan ky ((lang xa) OR (lang ha)) hoi. hieu ((va cam) OR (va cham)) thuc vat thanh di cua viet.
• Adding a wildcard symbol may retrieve word variants: thuat toan ky ((lang xa) or (lang ha)) hoi. hieu ((va cam) or (va cham)) thuc vat thanh di cua viet*.