Perhaps you should try some spelling variations:
ve triet » va trien, su triet
danh hai » dang hai, lanh hai, manh hai
hieu van » hieu va, thien van, lieu va
su sach » vu sach
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
van hoc » van hoa
tuc va » thuc va, truc va, duc va
hai ve » hoai ve, hai va, hai vu

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