Perhaps you should try some spelling variations:
thien van » thi van
cao hoi » cau hoi, co hoi, cao hoc
van cam » van nam, van lam, van cau
duc ban » duc van, dua ban, duc man
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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 cao hoi. thien van cam ((duc ban) OR (duc tan)) hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang cao hoi. thien van cam ((duc ban) OR (duc tan)) hanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang cao hoi. thien van cam ((duc ban) OR (duc tan)) hanh vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang cao hoi. thien van cam ((duc ban) OR (duc tan)) hanh vi ((cua tre) or (cuu tre))*.