Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh hai » thanh hai, nhanh hai, hang hai
va triet » va thiet, va trien, cua triet
viet cac » vien cac, viet ca, viet bac
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
su viet » so viet
va hanh » van hanh, va thanh, va danh
vu sach » vu bach, vu khach
su sach » so sach
cac tu » cac thu, cach tu, cac du

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) ky lang xa hoi. su viet cac tu va hanh hai ((va triet) OR (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky lang xa hoi. su viet cac tu va hanh hai ((va triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky lang xa hoi. su viet cac tu va hanh hai ((va triet) OR (ve triet))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky lang xa hoi. su viet cac tu va hanh hai ((va triet) OR (ve triet))*.