Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thuc day » thuc vat
hanh lai » hanh lam, hanh tai, thanh lap
thuc dan » thuc hanh, hoc dan, thuc vat
lai cua » dai cua, hai cua, lai chau
doc sac » doc sach, dac sac, hoc sach
thuc va » thuc vat
hieu vi » hieu voi, hieu va, hieu ve
nang ma » tang ma, sang ma, nang cao
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sac ky nang ma hoi. hieu vi pham ((((thuc va) or (thuc day))) or (thuc dan)) hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sac ky nang ma hoi. hieu vi pham ((((thuc va) OR (thuc day))) OR (thuc dan)) hanh lai cua viet.
• Adding a wildcard symbol may retrieve word variants: doc sac ky nang ma hoi. hieu vi pham ((((thuc va) or (thuc day))) or (thuc dan)) hanh lai cua viet*.