Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hieu thien » hieu hien, chieu chien, dieu khien
dang xay » dang van, van xay
nang xa » nang x, nang ma, mang xa
va hanh » van hanh, va thanh, va danh
lang xa » lang ha, lang van
hach du » hoach du, khach deu, thach duc
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
cua te » cua tu
du va » dau va, tu va, su va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (((lang xa) OR (dang xay)))) hoi. hieu thien hach du va hanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) or (((lang xa) OR (dang xay)))) hoi. hieu thien hach du va hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (((lang xa) OR (dang xay)))) hoi. hieu thien hach du va hanh vi cua te*.