Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
thuc va » thuc vat, thuc dan, thuc day
vai cua » dai cua, hai cua, lai cua
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
sang xa » song xa, lang xa, sang ma
ky sang » ky nang, ky dang, ky tang
tuc va » truc va, duc va, thuc vat

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 ky sang xa hoi. hieu van cam ((((tuc va) or (thuc va))) or (tuc xa)) hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky sang xa hoi. hieu van cam ((((tuc va) OR (thuc va))) OR (tuc xa)) hanh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach ky sang xa hoi. hieu van cam ((((tuc va) or (thuc va))) or (tuc xa)) hanh vai cua viet*.