Perhaps you should try some spelling variations:
hanh thanh » nhanh thanh, thanh thanh, khanh thanh
thanh dat » thanh san, thanh hai, thanh van
va triet » va thiet, va trien, ve triet
dang xay » dang van, van xay
va cham » va chat, va tham
ve chim » va chim, ve cham, ve chinh
sach ky » sach y, sach ty, sach kem
xay hoi » xa hoi, tay hoi, cay phoi
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) OR (sac ky)) dang xay hoi. hieu ((ve chim) or (va cham)) thuc hanh thanh dat va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) dang xay hoi. hieu ((ve chim) OR (va cham)) thuc hanh thanh dat va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) dang xay hoi. hieu ((ve chim) or (va cham)) thuc hanh thanh dat va triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) dang xay hoi. hieu ((ve chim) or (va cham)) thuc hanh thanh dat va triet*.