Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hanh keo » hanh kem, banh keo, hanh theo
van hanh » van thanh, ban hanh, van anh
luoc van » luoc can, luoc va, luc van
keo cua » keo sua, kho cua, khoe cua
va cam » va cham, va cac, va cao
nang o » nang co, nang ho, nang ro
ve cam » ve cham, ve cac, ve cai
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) ky nang o hoi. hieu ((ve cam) OR (va cam)) luoc van hanh keo cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky nang o hoi. hieu ((ve cam) OR (va cam)) luoc van hanh keo cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ky nang o hoi. hieu ((ve cam) OR (va cam)) luoc van hanh keo cua triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky nang o hoi. hieu ((ve cam) OR (va cam)) luoc van hanh keo cua triet*.