Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hoc sach » hoc sinh, hoc cac, hoc anh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve cham » va cham, ve chat, vu cham
tuc va » truc va, tuc xa, duc va
vi va » vi van, vai va, vu 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) or (hoc sach)) ky nang xa hoi. hieu ve cham ((tuc va) OR (thuc va)) hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (hoc sach)) ky nang xa hoi. hieu ve cham ((tuc va) OR (thuc va)) hanh vi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (hoc sach)) ky nang xa hoi. hieu ve cham ((tuc va) OR (thuc va)) hanh vi va triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (hoc sach)) ky nang xa hoi. hieu ve cham ((tuc va) OR (thuc va)) hanh vi va triet*.