Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
va doanh » van doanh, vay doanh, hoa doanh
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
mang xa » mang may, dang xay, mang cua
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
cam tu » cam thu, nam tu, dam tu
tu sac » tu sach, tu cac, tu san

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 ((mang xa) or (lang xa)) hoi. hieu va cam tu ((va doanh) or (va danh)) va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((mang xa) OR (lang xa)) hoi. hieu va cam tu ((va doanh) OR (va danh)) va su triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((mang xa) or (lang xa)) hoi. hieu va cam tu ((va doanh) or (va danh)) va su triet*.