Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
truc va » thuc va, thuc vat, trung va
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
ky dang » ky nang, ky danh
ma hoi » mai hoi, ma hoa, me hoi
san ky » sang ky, van ky, dan ky
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky dang ((ma hoi) OR (xa hoi)). hieu ve cham ((truc va) or (tuc xa)) dan vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky dang ((ma hoi) OR (xa hoi)). hieu ve cham ((truc va) OR (tuc xa)) dan vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky dang ((ma hoi) OR (xa hoi)). hieu ve cham ((truc va) or (tuc xa)) dan vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu san ky dang ((ma hoi) OR (xa hoi)). hieu ve cham ((truc va) or (tuc xa)) dan vi cua tre*.