Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh dai » hanh tai, vanh dai, thanh dat
hanh dao » lanh dao, thanh dat, thanh dam
thuc dan » thuc hanh, hoc dan, thuc vat
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu le » hieu ve, hieu he, hieu ly
thuc va » thuc vat, thuc day
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
le nam » ly nam, he nam, le na

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 tang xa hoi. hieu le nam ((thuc va) or (thuc dan)) ((hanh dai) OR (hanh dao)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky tang xa hoi. hieu le nam ((thuc va) OR (thuc dan)) ((hanh dai) OR (hanh dao)) cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky tang xa hoi. hieu le nam ((thuc va) or (thuc dan)) ((hanh dai) OR (hanh dao)) cua viet*".