Perhaps you should try some spelling variations:
thien van » thi van
dang xay » dang van, van xay
thanh va » thanh van, hanh va, thanh ha
thuc va » thuc dan, thuc day
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky dang xay hoi. thien van nam ((thuc va) or (thuc vat)) thanh va ((cua tre) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky dang xay hoi. thien van nam ((thuc va) OR (thuc vat)) thanh va ((cua tre) OR (cua cu)).
• Adding a wildcard symbol may retrieve word variants: su sac ky dang xay hoi. thien van nam ((thuc va) or (thuc vat)) thanh va ((cua tre) or (cua cu))*.