Perhaps you should try some spelling variations:
dang van » hoang van, hang va
cua tre » cua te, cuu tre, cua triet
minh vi » minh voi, dinh vi, minh ve
minh va » tinh va, sinh va, sinh vat
hieu ve » hieu va, hieu van
xuc ban » duc ban, cuc ban, quoc ban
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
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 ((nang cao) or (dang van)) hoi. hieu ve cam xuc ban ((minh vi) OR (minh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang cao) OR (dang van)) hoi. hieu ve cam xuc ban ((minh vi) OR (minh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang cao) or (dang van)) hoi. hieu ve cam xuc ban ((minh vi) OR (minh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang cao) or (dang van)) hoi. hieu ve cam xuc ban ((minh vi) OR (minh va)) cua tre*.