Perhaps you should try some spelling variations:
ve triet » va trien, su triet
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach tu, sach thu
hanh gi » hanh vi, danh gia, hanh noi
luc van » luoc van, luu van, duc van
cau luc » cau truc, cau phuc
so sach » so sanh, bo sach, co sach
hieu va » lieu va
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
gi ve » gia ve, gi de, gi he

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty ((nang xa) OR (lang xa)) hoi. ((hieu va) or (hieu qua)) cau luc van hanh gi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang xa) OR (lang xa)) hoi. ((hieu va) OR (hieu qua)) cau luc van hanh gi ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((nang xa) OR (lang xa)) hoi. ((hieu va) or (hieu qua)) cau luc van hanh gi ve triet".
• Adding a wildcard symbol may retrieve word variants: so sach ty ((nang xa) OR (lang xa)) hoi. ((hieu va) or (hieu qua)) cau luc van hanh gi ve triet*.