Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
tuc van » thuc van, truc van, tuc va
su sach » vu sach
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
doi ve » moi ve, doi va, noi ve

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