Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
duc manh » suc manh, duc anh, duc minh
hanh nam » thanh nam, hanh lam, hanh ngay
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua

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 ky lang xa hoi. hieu va cac ((duc manh) or (duc tan)) hanh nam cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. hieu va cac ((duc manh) OR (duc tan)) hanh nam cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu va cac ((duc manh) or (duc tan)) hanh nam cua triet*.