Perhaps you should try some spelling variations:
qua cam » qua cham, qua ca, qua cai
qua cac » cua cac
cua tre » cua te, cuu tre, cua triet
so sac » so sach, so dac
sac ky » cac ky, sai ky
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua
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: so sac ky nang x hoi. hieu ((qua cam) or (qua cac)) duc va dan vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky nang x hoi. hieu ((qua cam) OR (qua cac)) duc va dan vi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sac ky nang x hoi. hieu ((qua cam) or (qua cac)) duc va dan vi cua tre*.