Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh ve » hanh vi, hanh va, hanh kem
hanh de » hanh kem
luu van » cuu van, luan van, luu hanh
vu cham » va cham, vu kham, tu cham
ve cham » va cham, ve chat, ve chim
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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

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