Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lam » thanh lap, hanh lam, thanh nam
va thanh » gia thanh, ban thanh, va tinh
vien cac » vien bach, vien dai, vien da
lam cua » nam cua, lam chat
su sach » so sach
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
vu sach » vu bach, vu khach
ha hoi » hoa hoi, ha noi, xa hoi
ve cac » va cac

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