Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hieu va » lieu va, hieu qua
nam qua » nam quan, nam cua, nam mua
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay
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: tu sac ky nang x hoi. hieu va nam qua ((lap trinh) or (van thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang x hoi. hieu va nam qua ((lap trinh) OR (van thanh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. hieu va nam qua ((lap trinh) or (van thanh)) vi cua tre*.