Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh hai » thanh phan, thanh hoa, thanh san
chat xuc » chat huu, cam xuc, chao xu
va trien » va truyen, va tuyen, va tieng
su sach » so sach, vu sach
xuc van » duc van, luc van, vuc van
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
thiet » thieu

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 hai ((va trien) OR (va thiet))~.
• 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 hai ((va trien) OR (va thiet)).
• 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 hai ((va trien) OR (va thiet))".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. ((hieu ve) or (hieu va)) chat xuc van thanh hai ((va trien) OR (va thiet))*.