Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nam thuc » nam thuoc, am thuc, nam thu
van hanh » van thanh, ban hanh, van anh
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va hanh » va danh, ban hanh, dao hanh
va nam » van nam, ha nam, va nay
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. lieu va nam thuc ((((va hanh) OR (van hanh))) or (va thanh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. lieu va nam thuc ((((va hanh) OR (van hanh))) OR (va thanh)) vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. lieu va nam thuc ((((va hanh) OR (van hanh))) or (va thanh)) vi su triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. lieu va nam thuc ((((va hanh) OR (van hanh))) or (va thanh)) vi su triet*.