Perhaps you should try some spelling variations:
tru nang » tra nang, tri nang, truc nano
hanh tai » thanh tai, hang tai, han tai
nhan luc » nang luc
te sach » toc sach
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
hieu va » lieu va
cua tuc » cua duc, cua tu, cua thuoc
tu nano » truc nano
luc va » duc va, tuc va, loc va
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: te sach ((tru nang) or (tu nano)) x hoi. ((hieu va) or (hieu qua)) nhan luc va hanh tai cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tru nang) OR (tu nano)) x hoi. ((hieu va) OR (hieu qua)) nhan luc va hanh tai cua tuc.
• Adding a wildcard symbol may retrieve word variants: te sach ((tru nang) or (tu nano)) x hoi. ((hieu va) or (hieu qua)) nhan luc va hanh tai cua tuc*.