Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van chat » cao chat
va triet » va thiet, va trien, cua triet
danh day » danh dau, dan day, doanh dao
ve triet » va trien, su triet
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
soc va » hoc va, doc va, goc va
loc va » hoc va, luc va

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 ty nang xa hoi. hieu van chat ((soc va) or (loc va)) danh day ((va triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang xa hoi. hieu van chat ((soc va) OR (loc va)) danh day ((va triet) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. hieu van chat ((soc va) or (loc va)) danh day ((va triet) or (ve triet))*.