Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
xuc van » duc van, luc van, vuc van
y nang » ky nang, ly nang, v nang
va cam » va cham, va cao, va cai

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

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