Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, hieu ve
hanh tri » thanh tri, hanh tai, hanh trinh
van hanh » van thanh, ban hanh, van anh
tru nang » tra nang, tri nang, truc nano
cham xu » chao xu, cham cuu, chat xuc
tu nang » tu nong, tu nano, tu lang
su sach » so sach, vu sach
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) OR (lieu va)) cham xu van hanh tri cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tu nang) OR (tru nang)) o hoi. ((hieu van) OR (lieu va)) 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) OR (lieu va)) 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) OR (lieu va)) cham xu van hanh tri cua viet*.