Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
nang dai » nang dau, nang tai, lang dai
van hanh » van thanh, ban hanh, van anh
cham duc » pham duc, cham soc, pham duy
sach uu » sach luu, sach tu, sach xu
dai hoi » dai hoc, dai hai, dai moi
sach vu » sach va, sach tu, sach xu
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duc van » duc va, duc tan, duc manh
hanh ki » hanh vi, hanh ky, hanh kien
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach vu) or (sach uu)) nang dai hoi. hieu va cham duc van hanh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach vu) OR (sach uu)) nang dai hoi. hieu va cham duc van hanh ki su triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach vu) or (sach uu)) nang dai hoi. hieu va cham duc van hanh ki su triet*.