Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » thien van, lieu va, hieu ve
thuc van » thuc vat, thuc dan, thuc hanh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
hanh di » hanh vi, hanh de, hang di
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. ((hieu van) OR (hieu va)) cam ((thuc van) or (thuc va)) hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. ((hieu van) OR (hieu va)) cam ((thuc van) OR (thuc va)) hanh di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. ((hieu van) OR (hieu va)) cam ((thuc van) or (thuc va)) hanh di cua triet*".