Perhaps you should try some spelling variations:
thien van » thi van
su viet » so viet
va hanh » van hanh, va thanh, va danh
va dan » ca dan, va dao, va dau
bach y » sach y
y nang » ky nang, ly nang, v nang
cam tu » cam thu, nam tu, dam tu
ca thu » cac thu, cam thu, ca tru
x hoi » xa hoi, o hoi, x ho
ve su » va 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 bach y nang x hoi. thien van ((cam tu) or (ca thu)) ((va hanh) or (va dan)) ve su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach y nang x hoi. thien van ((cam tu) OR (ca thu)) ((va hanh) OR (va dan)) ve su viet.
• Adding a wildcard symbol may retrieve word variants: vu bach y nang x hoi. thien van ((cam tu) or (ca thu)) ((va hanh) or (va dan)) ve su viet*.