Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh hoi » thanh hoai, thanh hoa, thanh hai
van thanh » ban thanh, van tuan
ky sang » ky nang, ky tang, duy sang
cua tre » cua te, cuu tre, dua tren
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
tu sac » tu sach, tu cac, tu san
ve cam » ve cham, ve cac, va cam

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 sang) or (ky dang)) xa hoi. hieu ve cam duc van thanh hoi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky sang) OR (ky dang)) xa hoi. hieu ve cam duc van thanh hoi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky sang) or (ky dang)) xa hoi. hieu ve cam duc van thanh hoi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky sang) or (ky dang)) xa hoi. hieu ve cam duc van thanh hoi ((cua tre) OR (cua triet))*.