Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac truc » cau truc, cac tru, cac trung
vu sach » vu bach, su sach, vu khach
ky lang » ky dang, ky tang, tay lang
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
va tinh » may tinh
tinh va » tich va, trinh van, trinh vat
ve cac » va cac, vien cac
cua tu » cua tuc, cua su, cua cu

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 lang) OR (ky nang)) xa hoi. hieu ve cac truc va tinh va ((cua tu) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ky lang) OR (ky nang)) xa hoi. hieu ve cac truc va tinh va ((cua tu) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ky lang) OR (ky nang)) xa hoi. hieu ve cac truc va tinh va ((cua tu) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky lang) OR (ky nang)) xa hoi. hieu ve cac truc va tinh va ((cua tu) or (cua triet))*.