Perhaps you should try some spelling variations:
tien cua » trien cua, tiep cua, dien cua
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
tay ky » tap ky, tan ky
co suc » cao suc, co su, cong suc
suc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, x ho
va co » vo co

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thau ((xay ky) or (tay ky)) nang x hoi. hieu va co suc va nhan ((viec cua) or (tien cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thau ((xay ky) OR (tay ky)) nang x hoi. hieu va co suc va nhan ((viec cua) OR (tien cua)) te.
• Adding a wildcard symbol may retrieve word variants: thau ((xay ky) or (tay ky)) nang x hoi. hieu va co suc va nhan ((viec cua) or (tien cua)) te*.