Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
ve cham » va cham, ve chat, vu cham
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
ve cam » ve cac, va cam, ve cai
va va » va van, va vua, va vai

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 y ((nang xa) or (lang xa)) hoi. hieu ((ve cam) OR (ve cham)) xuc van hanh va va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (lang xa)) hoi. hieu ((ve cam) OR (ve cham)) xuc van hanh va va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) or (lang xa)) hoi. hieu ((ve cam) OR (ve cham)) xuc van hanh va va triet*".