Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
ve cham » va cham, ve chat, ve chim
vu cham » va cham, vu kham, tu cham
sach ty » sach y, sach tu, sach thu
duc van » duc va, duc tan, duc manh
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach

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