Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hanh tri » thanh tri, hanh tai, hanh trinh
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
dang xa » lang xa, dang ha, dang va
cua tre » cuu tre, cua triet, dua tren
duc van » duc va, duc tan, duc manh
su sai » su tai, su hai, su dai
ve cam » ve cham, ve cac, va cam
sai ky » sac ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky ((dang xa) or (dang xay)) hoi. hieu ve cam duc van hanh tri ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky ((dang xa) OR (dang xay)) hoi. hieu ve cam duc van hanh tri ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky ((dang xa) or (dang xay)) hoi. hieu ve cam duc van hanh tri ((cua tre) OR (cua te))*".