Perhaps you should try some spelling variations:
thieu nang » thien nang, thieu khang, thieu quang
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
va hanh » va thanh, va danh, ban hanh
vai cua » dai cua, hai cua, lai cua
ve 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: thu sach thieu nang xa hoi. hieu ((ve cac) OR (va cac)) xuc ((va hanh) or (van hanh)) vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thieu nang xa hoi. hieu ((ve cac) OR (va cac)) xuc ((va hanh) OR (van hanh)) vai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach thieu nang xa hoi. hieu ((ve cac) OR (va cac)) xuc ((va hanh) or (van hanh)) vai cua viet".
• Adding a wildcard symbol may retrieve word variants: thu sach thieu nang xa hoi. hieu ((ve cac) OR (va cac)) xuc ((va hanh) or (van hanh)) vai cua viet*.