Perhaps you should try some spelling variations:
vien cua » viec cua, dien cua, tien cua
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
sach ty » sach y, sach tu, sach thu
hieu ve » hieu van
sach ky » sac ky, sach y, sach kem
cao tuc » dao tuc, cao duc, cao suc
tuc va » thuc va, truc va, tuc xa
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: thu ((sach ky) or (sach ty)) nang x hoi. ((hieu ve) OR (hieu va)) cao tuc va nhan vien cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach ty)) nang x hoi. ((hieu ve) OR (hieu va)) cao tuc va nhan vien cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sach ty)) nang x hoi. ((hieu ve) OR (hieu va)) cao tuc va nhan vien cua te*".