Perhaps you should try some spelling variations:
thu sac » thu sach, thu san, thu xac
hieu va » lieu va, hieu qua
cao suc » cao su, cao duc
ca phap » cua phap, cau phap, va phap
sac ky » cac ky, sai ky
va cao » va cac, va co, va dao
suc ca » suc cap, suc co, suc ma
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky nang x hoi. hieu va cao suc ca phap tieng ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang x hoi. hieu va cao suc ca phap tieng ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang x hoi. hieu va cao suc ca phap tieng ((cua te) or (cua tu))*.