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
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
vai cua » dai cua, hai cua, lai cua
doi cua » dai cua, hoi cua
va cam » va cham, va cac, va cao
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 xuc van hanh ((vai 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 xuc van hanh ((vai cua) OR (doi cua)) triet.
• Adding a wildcard symbol may retrieve word variants: su sach tru nang x hoi. hieu va cam xuc van hanh ((vai cua) or (doi cua)) triet*.