Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
nhan luc » nang luc
nhan duc » nhan duoc, phan duc, than duc
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
cua te » cua tu
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 ky) or (sach ty)) nang x hoi. hieu qua ((nhan duc) OR (nhan luc)) va hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang x hoi. hieu qua ((nhan duc) OR (nhan luc)) va hanh dai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sach ty)) nang x hoi. hieu qua ((nhan duc) OR (nhan luc)) va hanh dai cua te*".