Perhaps you should try some spelling variations:
thai cua » than cua, tai cuc, tri cua
thuc dan » thuc hanh, hoc dan
hieu ve » hieu va, hieu van
hai cua » dai cua, hoi cua, lai cua
nang ma » tang ma, sang ma, nang cao
ve nam » he nam, va nam, le nam
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
su sac » su sach, su cac, su xac

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 nang ma hoi. hieu ve nam ((thuc dan) OR (thuc vat)) thanh ((hai cua) or (thai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang ma hoi. hieu ve nam ((thuc dan) OR (thuc vat)) thanh ((hai cua) OR (thai cua)) viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang ma hoi. hieu ve nam ((thuc dan) OR (thuc vat)) thanh ((hai cua) or (thai cua)) viet*".