Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
bang hanh » bang thanh, ban hanh, bang hinh
hoc sach » hoc sinh, hoc cac, hoc anh
nang mai » nang ma, nang tai, lang mai
hoc bang » hoc bong, hoc tang, hoc dan
vu cham » va cham, vu kham, tu cham
hanh ve » hanh vi, hanh va, hanh kem
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
ve cham » va cham, ve chat, ve chim
ve cua » le cua, de cua, te cua

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) or (hoc sach)) ky nang mai hoi. hieu ((ve cham) OR (vu cham)) hoc bang hanh ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) ky nang mai hoi. hieu ((ve cham) OR (vu cham)) hoc bang hanh ve cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (hoc sach)) ky nang mai hoi. hieu ((ve cham) OR (vu cham)) hoc bang hanh ve cua triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) ky nang mai hoi. hieu ((ve cham) OR (vu cham)) hoc bang hanh ve cua triet*.