Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
van hanh » van thanh, ban hanh, van anh
doi cua » dai cua, hoi cua
xuc van » duc van, luc van, vuc van
su sach » so sach, vu sach
va cham » va chat, va tham
va cam » va cac, va cao, va cai
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 tru nang x hoi. hieu ((va cam) OR (va cham)) xuc van hanh ((vi cua) or (doi cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tru nang x hoi. hieu ((va cam) OR (va cham)) xuc van hanh ((vi cua) OR (doi cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tru nang x hoi. hieu ((va cam) OR (va cham)) xuc van hanh ((vi cua) or (doi cua)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach tru nang x hoi. hieu ((va cam) OR (va cham)) xuc van hanh ((vi cua) or (doi cua)) triet*.