Perhaps you should try some spelling variations:
duc tien » duc thien, luc tieng, thuc tien
dang mat » dang vat, dang mau, dung mat
va thanh » gia thanh, ban thanh, va tinh
ban hanh » ban hang
ky dang » ky nang, ky danh
mat hoa » ma hoa, mai hoa, chat hoa
hieu ve » hieu va, hieu van
duc tre » duoc tren
cac tuc » cac toc, cac tu, cac tac
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cac » va cac, vien cac

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 mat hoa. hieu ve cac tuc ((va thanh) or (ban hanh)) may ((duc tre) or (duc tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang mat hoa. hieu ve cac tuc ((va thanh) OR (ban hanh)) may ((duc tre) OR (duc tien)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang mat hoa. hieu ve cac tuc ((va thanh) or (ban hanh)) may ((duc tre) or (duc tien))*.