Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vu khach » vu khanh, vu khac, vay khach
thuc dan » thuc hanh, hoc dan
hanh va » hang va, hanh vi
vu sach » vu bach, su sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
hieu ve » hieu va, hieu van
va cua » va chua, via cua, ca cua
ve am » va am

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) OR (vu khach)) ky lang xa hoi. hieu ve am ((thuc dan) or (thuc vat)) hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) ky lang xa hoi. hieu ve am ((thuc dan) OR (thuc vat)) hanh va cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu khach)) ky lang xa hoi. hieu ve am ((thuc dan) or (thuc vat)) hanh va cua triet*".