Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
xuc van » vuc van, xuc ban, thuc van
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
hai va » hai van, thai va, hoi va

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