Perhaps you should try some spelling variations:
dung sai » dung tai, dung va, dung dat
tu cach » tu cac
sai cua » dai cua, hai cua, lai cua
va dung » van dung, va duong, vat dung
cac bac » cac bai, cac ban, cac cach
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
te sach » toc sach
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: ((tu cach) or (te sach)) ky nang xa hoi. hieu ve ((cac duc) or (cac bac)) va dung sai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky nang xa hoi. hieu ve ((cac duc) OR (cac bac)) va dung sai cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang xa hoi. hieu ve ((cac duc) or (cac bac)) va dung sai cua te*.