Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
va thanh » gia thanh, ban thanh, va tinh
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho
vi va » vi van, vai va, bi va
vu va » vu 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 thu nang x hoi. lieu va cam xuc ((va thanh) or (van hanh)) ((vi va) or (vu va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu nang x hoi. lieu va cam xuc ((va thanh) OR (van hanh)) ((vi va) OR (vu va)) triet.
• Adding a wildcard symbol may retrieve word variants: su sach thu nang x hoi. lieu va cam xuc ((va thanh) or (van hanh)) ((vi va) or (vu va)) triet*.