Perhaps you should try some spelling variations:
thien van » thi van
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan, thuc day
cuc tre » duc tre, cua tre, cuc thue
dau thi » cau thi, dan thi, dao thi
cuu tre » cua tre, cau tren, cau treo
van cac » van hac, van cau, van bac
xay hoi » xa hoi, tay hoi, cay phoi
y dang » ky dang, 2 dang, _ dang
tuc va » truc va, tuc xa, duc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y dang xay hoi. thien van cac ((tuc va) OR (thuc va)) dau thi ((cuc tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y dang xay hoi. thien van cac ((tuc va) OR (thuc va)) dau thi ((cuc tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y dang xay hoi. thien van cac ((tuc va) OR (thuc va)) dau thi ((cuc tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach y dang xay hoi. thien van cac ((tuc va) OR (thuc va)) dau thi ((cuc tre) or (cuu tre))*.