Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach ly » sach y, sach lo, sach ty
luc van » luoc van, luu van, duc van
vu sach » vu bach, su sach, vu khach
vu nhan » vu ngan, tu nhan, va nhan
cu nhan » ca nhan
ma hoi » mai hoi, xa hoi, ma hoa
san ma » sang ma, ban ma, san va

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

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