Perhaps you should try some spelling variations:
vien cua » viec cua, dien cua, tien cua
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
suc van » duc van, luc van, sac van
sac ky » sai ky
va cao » va cac, va co, va dao
su van » tu van, vu van
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sac ky) or (cac ky)) nang xa hoi. hieu va cao ((suc van) OR (su van)) nhan vien cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sac ky) OR (cac ky)) nang xa hoi. hieu va cao ((suc van) OR (su van)) nhan vien cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sac ky) or (cac ky)) nang xa hoi. hieu va cao ((suc van) OR (su van)) nhan vien cua tu".
• Adding a wildcard symbol may retrieve word variants: thu ((sac ky) or (cac ky)) nang xa hoi. hieu va cao ((suc van) OR (su van)) nhan vien cua tu*.