Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sach ky » sac ky, sach y, sach ty
tinh va » tich va, trinh van, trinh vat
tuc may » truc may, tu may, tuc xay
coc tuc » coc luc, hoc thuc, doc thuc
hieu va » lieu va, hieu qua
vu sach » vu bach, su sach, vu khach
hieu ve » hieu van
xay hoi » tay hoi, cay phoi, gay thoi
ky dang » ky nang, ky danh
va ve » va de, va le, va vi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky dang ((xay hoi) or (xa hoi)). ((hieu ve) or (hieu va)) coc tuc may tinh va ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky dang ((xay hoi) OR (xa hoi)). ((hieu ve) OR (hieu va)) coc tuc may tinh va ve triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ky dang ((xay hoi) or (xa hoi)). ((hieu ve) or (hieu va)) coc tuc may tinh va ve triet*.