Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
truc va » thuc va, trung va
vai cua » dai cua, hai cua, lai cua
y dang » ky dang, 2 dang, _ dang
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: su sach y dang xay hoi. hieu ve cam ((truc va) or (thuc vat)) hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y dang xay hoi. hieu ve cam ((truc va) OR (thuc vat)) hanh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach y dang xay hoi. hieu ve cam ((truc va) or (thuc vat)) hanh vai cua viet*.