Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
lang xa » lang ha, dang xay, lang van
tang xa » trang xa, tang ma, tang ha
sac ky » cac ky, sai ky
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san

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 ((tang xa) or (lang xa)) hoi. hieu ve cham ((duc va) or (thuc va)) dan vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((tang xa) OR (lang xa)) hoi. hieu ve cham ((duc va) OR (thuc va)) dan vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((tang xa) or (lang xa)) hoi. hieu ve cham ((duc va) or (thuc va)) dan vi cua tre*.