Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan
va triet » va thiet, va trien, ve triet
vu sach » vu bach, su sach, vu khach
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
hanh va » hang va, hanh vi
ve am » va am
va va » va van, va vua, va vai

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