Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
cac truc » cau truc, cac tru, cac trung
dua tren » dung tren
va tich » va tinh, va dich
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
truc va » thuc va, thuc vat, trung va
ve cac » va cac, vien cac

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 tang xa hoi. hieu ve cac truc va tich va ((dua tren) or (((cua triet) OR (su triet))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky tang xa hoi. hieu ve cac truc va tich va ((dua tren) OR (((cua triet) OR (su triet))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky tang xa hoi. hieu ve cac truc va tich va ((dua tren) or (((cua triet) OR (su triet))))*".