Perhaps you should try some spelling variations:
hieu cao » chieu cao, hieu cac, hieu ca
hanh dan » thanh dan, hanh san, canh dan
thu ban » thu hang
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
soc van » hoc van, oc van, soc dan
sac van » cac van, san van, sat van
su tien » su kien, su hien, tu tieng
ban ky » van ky, dan ky
dan su » dang su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ban ky lang xa hoi. hieu cao chat ((soc van) or (sac van)) hanh dan su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ban ky lang xa hoi. hieu cao chat ((soc van) OR (sac van)) hanh dan su tien.
• Adding a wildcard symbol may retrieve word variants: thu ban ky lang xa hoi. hieu cao chat ((soc van) or (sac van)) hanh dan su tien*.