Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
thanh lap » thanh san, phan lap, thanh van
thu sach » tu sach, thuat sach, thuoc sach
va trien » va truyen, va thiet, va tuyen
van bac » van bao, van hac, dan bac
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu ((van bac) OR (van ban)) duc va ((thanh lap) or (thanh hai)) va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu ((van bac) OR (van ban)) duc va ((thanh lap) OR (thanh hai)) va trien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu ((van bac) OR (van ban)) duc va ((thanh lap) or (thanh hai)) va trien*".