Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu hien » bieu hien, dieu hien, chieu chien
hien hanh » dieu hanh
danh dau » lanh dao, hang dau, danh tu
ky lang » ky dang, ky tang, tay lang
tuoc va » thuoc va, nuoc va, duoc va
duoc ma » duoc lam
dau cua » dai cua, day cua, cau cua
su sach » so sach, vu sach

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 ((ky lang) or (ky nang)) xa hoi. hieu hien hanh ((tuoc va) or (duoc ma)) danh dau cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (ky nang)) xa hoi. hieu hien hanh ((tuoc va) OR (duoc ma)) danh dau cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) or (ky nang)) xa hoi. hieu hien hanh ((tuoc va) or (duoc ma)) danh dau cua triet*.