Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
va tham » van tham, va thanh, va thuat
va chat » van chat, va phat, cao chat
su viet » so viet
ty nang » ky nang, ty xang, ty hang
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai
xu va » xu van, tu va, su va

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 ty nang o hoi. hieu ((((va cham) OR (va chat))) or (va tham)) xu va hanh lai su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang o hoi. hieu ((((va cham) OR (va chat))) OR (va tham)) xu va hanh lai su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang o hoi. hieu ((((va cham) OR (va chat))) or (va tham)) xu va hanh lai su viet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang o hoi. hieu ((((va cham) OR (va chat))) or (va tham)) xu va hanh lai su viet*.