Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
ky lang » ky dang, ky tang, tay lang
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
cua tre » cua te, cuu tre, dua tren
vu sac » vu sach, vu san, va sac
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ((ky lang) or (ky nang)) xa hoi. hieu ve cau luc va thanh va ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ((ky lang) OR (ky nang)) xa hoi. hieu ve cau luc va thanh va ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ((ky lang) or (ky nang)) xa hoi. hieu ve cau luc va thanh va ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: vu sac ((ky lang) or (ky nang)) xa hoi. hieu ve cau luc va thanh va ((cua tre) OR (cua triet))*.