Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
dan thanh » dang thanh, danh thanh, ban thanh
va triet » va thiet, va trien, ve triet
thuc dan » thuc hanh, hoc dan, thuc vat
va cham » va chat, va tham
ve chim » va chim, ve cham, ve chinh
lang xa » lang ha, dang xay, lang van
dang xa » dang xay, dang ha, dang va
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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 ((dang xa) or (lang xa)) hoi. hieu ((ve chim) or (va cham)) thuc dan thanh dat va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((dang xa) OR (lang xa)) hoi. hieu ((ve chim) OR (va cham)) thuc dan thanh dat va triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((dang xa) or (lang xa)) hoi. hieu ((ve chim) or (va cham)) thuc dan thanh dat va triet*.