Perhaps you should try some spelling variations:
cham thuc » nham thuc, tham thuc, pham thuoc
pham thuc » phap thuc, pham chuc, nham thuc
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
hoc anh » hoc nganh, hoc nhanh, ngoc anh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
xa hanh » xa thanh, xa khanh, va hanh
vi cua » vai cua, di cua

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