Perhaps you should try some spelling variations:
van thanh » ban thanh
va triet » va thiet, va trien, ve triet
chat xuc » chat huu, cam xuc, chao xu
van tuan » van quan, van ban, anh tuan
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
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 ty nang xa hoi. ((hieu ve) or (hieu va)) chat xuc ((van thanh) OR (van tuan)) hai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. ((hieu ve) OR (hieu va)) chat xuc ((van thanh) OR (van tuan)) hai va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. ((hieu ve) or (hieu va)) chat xuc ((van thanh) OR (van tuan)) hai va triet*".