Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
vai cua » dai cua, hai cua, lai cua
va tinh » may tinh
va danh » va dinh, va dan, va hanh
cam tuc » cam xuc, cam tu, nam thuc
so danh » do danh, so dan, so dang
cao hoi » cau hoi, co hoi, cao hoc
ly nang » ky nang, ly hang, ly vang
so sanh » do sanh
van cam » van nam, van lam, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so danh) or (so sanh)) ly nang cao hoi. hieu van cam tuc ((va danh) or (va tinh)) vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so danh) OR (so sanh)) ly nang cao hoi. hieu van cam tuc ((va danh) OR (va tinh)) vai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((so danh) or (so sanh)) ly nang cao hoi. hieu van cam tuc ((va danh) or (va tinh)) vai cua viet*.