Perhaps you should try some spelling variations:
ve triet » va trien, su triet
ban hanh » ban hang
hanh ve » hanh vi, hanh va, hanh kem
luu ban » luu bang, luu van, luu dan
te sach » toc sach
nang xa » nang x, lang xa, nang ma
sang ma » tang ma, nang ma, sang tao
ke cau » ket cau
ve cau » va cau, ve cac, le cau
ve ve » de ve, va ve, ke 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 y ((nang xa) or (sang ma)) hoi. hieu ((ve cau) OR (ke cau)) luu ban hanh ve ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (sang ma)) hoi. hieu ((ve cau) OR (ke cau)) luu ban hanh ve ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang xa) or (sang ma)) hoi. hieu ((ve cau) OR (ke cau)) luu ban hanh ve ve triet*".