Perhaps you should try some spelling variations:
tang dai » tang tai, lang dai, tang da
tang dan » tang van, tung dan, tang luan
ban hanh » ban hang
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
ve ham » ve cham, le ham, ve am
ham so » nam so, cham soc
so ban » sao ban, so bang, co ban
vi cuu » vi luu, vinh cuu

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky ((tang dai) OR (tang dan)) hoi. hieu ve ham so ban hanh vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu cac ky ((tang dai) OR (tang dan)) hoi. hieu ve ham so ban hanh vi cuu tre*.