Perhaps you should try some spelling variations:
tru nang » tra nang, tri nang, truc nano
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
van hanh » van thanh, ban hanh, van anh
hanh tri » thanh tri, hanh tai, hanh trinh
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
tu nang » tu nong, tu nano, tu lang
cham xu » chao xu, cham cuu, chat xuc
xu van » tu van, vu van, su van
o hoi » co hoi, o hoc, o hai

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 ((tu nang) OR (tru nang)) o hoi. hieu van cham xu van hanh tri cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tu nang) OR (tru nang)) o hoi. hieu van cham xu van hanh tri cua viet".
• Adding a wildcard symbol may retrieve word variants: su sach ((tu nang) OR (tru nang)) o hoi. hieu van cham xu van hanh tri cua viet*.