Perhaps you should try some spelling variations:
gian cac » gian dan, gian cua
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
xuc ban » duc ban, cuc ban, quoc ban
tai cua » thai cua, tri cua, dai cua

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 ty nang xa hoi. hieu ((gian cac) or (vien bach)) xuc ban hanh ((tai cua) OR (tai cuc)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu ((gian cac) OR (vien bach)) xuc ban hanh ((tai cua) OR (tai cuc)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu ((gian cac) or (vien bach)) xuc ban hanh ((tai cua) OR (tai cuc)) viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ((gian cac) or (vien bach)) xuc ban hanh ((tai cua) OR (tai cuc)) viet*.