Perhaps you should try some spelling variations:
cua viet » ca viet, cua vat, cua dieu
pham duy » pham duc
tu sach » thu sach, te sach, tu cach
va hanh » van hanh, va thanh, va danh
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
nang co » nang cao, nang doc, nang noi
ly nang » ky nang, ly hang, ly vang
su sach » so sach, vu sach
co hoi » co hoc, co loi
duy va » duy vat, duy van, day va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) ly nang co hoi. hieu ve pham duy va hanh vi ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ly nang co hoi. hieu ve pham duy va hanh vi ((cua viet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ly nang co hoi. hieu ve pham duy va hanh vi ((cua viet) or (hoa viet))*.