Perhaps you should try some spelling variations:
dung may » dung va, dung tai, mang may
dang tay » dang xay, dung tay, dan tay
ban lanh » ban hanh, ban linh, ban anh
lanh hai » manh hai, thanh hai, lang chai
cua viet » ca viet, hoa viet, cua vat
so sanh » do sanh
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
hai cua » thai cua, dai cua, hoi cua
sanh y » sinh y, anh y, hanh y

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh y ((dang tay) or (dung may)) hoi. lieu va cac duc ban lanh hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y ((dang tay) OR (dung may)) hoi. lieu va cac duc ban lanh hai cua viet.
• Adding a wildcard symbol may retrieve word variants: so sanh y ((dang tay) or (dung may)) hoi. lieu va cac duc ban lanh hai cua viet*.