Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
danh day » danh dau, dan day, doanh dao
va trien » va truyen, va thiet, va tuyen
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
soc va » loc va, doc va, goc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. hieu van chat ((soc va) OR (hoc va)) danh day va trien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu van chat ((soc va) OR (hoc va)) danh day va trien".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu van chat ((soc va) OR (hoc va)) danh day va trien*.