Perhaps you should try some spelling variations:
cac truc » cau truc, cac tru, cac trung
truc van » truc va, thuc van, truc ban
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
hieu va » hieu qua
hanh ca » hanh cac, hanh cat, hanh cua
y nang » ky nang, ly nang, v nang
me hoi » le hoi
ca su » cua su, cao su, ca sau

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 y nang ((me hoi) OR (ma hoa)). ((hieu va) OR (lieu va)) cac truc van hanh ca su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((me hoi) OR (ma hoa)). ((hieu va) OR (lieu va)) cac truc van hanh ca su triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((me hoi) OR (ma hoa)). ((hieu va) OR (lieu va)) cac truc van hanh ca su triet*.