Perhaps you should try some spelling variations:
ve triet » va trien, su triet
van hanh » van thanh, ban hanh, van anh
hanh vu » hanh vi, hanh va, hanh tu
luc van » luoc van, luu van, duc van
sach ky » sach y, sach ty, sach kem
dong ha » dong hoa, dong va, dong hoc
ha hoi » hoa hoi, ha noi, xa hoi
va cam » va cham, va cac, va cao
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, ve cai
vu ve » vu le, vu va, su ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sac ky)) dong ha hoi. hieu ((ve cam) OR (va cam)) luc van hanh vu ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) dong ha hoi. hieu ((ve cam) OR (va cam)) luc van hanh vu ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sac ky)) dong ha hoi. hieu ((ve cam) OR (va cam)) luc van hanh vu ve triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sac ky)) dong ha hoi. hieu ((ve cam) OR (va cam)) luc van hanh vu ve triet*.