Perhaps you should try some spelling variations:
cua triet » su triet, va triet
duc manh » suc manh, duc anh, duc minh
hanh tai » thanh tai, hang tai, han tai
cua viet » ca viet, hoa viet, cua vat
nang co » nang cao, nang doc, nang noi
hieu ve » hieu va, hieu van
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
co hoi » co hoc, co loi
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang co hoi. hieu ve cac ((duc manh) or (duc tan)) hanh tai ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang co hoi. hieu ve cac ((duc manh) OR (duc tan)) hanh tai ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang co hoi. hieu ve cac ((duc manh) or (duc tan)) hanh tai ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang co hoi. hieu ve cac ((duc manh) or (duc tan)) hanh tai ((cua triet) OR (cua viet))*.