Perhaps you should try some spelling variations:
nhan luc » nang luc
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
nhan luu » nhan lupus, nhan luan, thanh luu
tu sach » thu sach, su sach, te sach
ca viet » va viet, co viet, hoa viet
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma

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 nang xa hoi. hieu va ((nhan luu) OR (nhan luc)) van hanh vi ((su triet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu va ((nhan luu) OR (nhan luc)) van hanh vi ((su triet) OR (ca viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu va ((nhan luu) OR (nhan luc)) van hanh vi ((su triet) or (ca viet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu va ((nhan luu) OR (nhan luc)) van hanh vi ((su triet) or (ca viet))*.