Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh dao » lanh dao, thanh dat, thanh dam
van chat » cao chat
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
vu sach » vu bach, su sach, vu khach
van hoc » van hoa
van hoi » van hoa, van hoe, van loi
van cau » van dau, van hau, toan cau
tuc va » thuc va, truc va, tuc xa
dao su » dao suu, dan su, cao su

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang ((van hoi) OR (van hoc)). thi ((van cau) or (van chat)) tuc va hanh dao su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang ((van hoi) OR (van hoc)). thi ((van cau) OR (van chat)) tuc va hanh dao su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang ((van hoi) OR (van hoc)). thi ((van cau) or (van chat)) tuc va hanh dao su triet".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang ((van hoi) OR (van hoc)). thi ((van cau) or (van chat)) tuc va hanh dao su triet*.