Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
thanh dat » thanh san, thanh hai, thanh van
xach tay » canh tay
cham hoc » cham soc, chat hoc, cham hoi
cua viet » ca viet, hoa viet, cua vat
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
va cham » va chat, va tham
dat cua » dai cua, day cua, mat cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((xach tay) or (sach thieu)) xang xa hoi. hieu va cham hoc dan thanh dat cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((xach tay) OR (sach thieu)) xang xa hoi. hieu va cham hoc dan thanh dat cua viet.
• Adding a wildcard symbol may retrieve word variants: su ((xach tay) or (sach thieu)) xang xa hoi. hieu va cham hoc dan thanh dat cua viet*.