Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh lam » thanh lap, hanh kem, hanh va
van hanh » van thanh, ban hanh, van anh
chat luc » chat xuc, chat lua, nhan luc
lang van » dang van, tang van, hoang van
dang xay » dang van, van xay
luc van » luoc van, luu van, duc van
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha
lam va » nam va, dam va, lam ha

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 ty ((((lang xa) or (lang van))) or (dang xay)) hoi. hieu va chat luc van hanh lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((((lang xa) OR (lang van))) OR (dang xay)) hoi. hieu va chat luc van hanh lam va triet.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((((lang xa) or (lang van))) or (dang xay)) hoi. hieu va chat luc van hanh lam va triet*.