Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham duc » pham duc, cham soc, pham duy
hang di » hang doi, hang dien, hang dich
hang vi » hang va, hanh vi, khang voi
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
duc van » duc va, duc tan, duc manh
ma hoi » mai hoi, xa hoi, ma hoa

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 ky nang ma hoi. hieu van cham duc van ((hoang kim) or (((hang vi) OR (hang di)))) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu van cham duc van ((hoang kim) OR (((hang vi) OR (hang di)))) ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoi. hieu van cham duc van ((hoang kim) or (((hang vi) OR (hang di)))) ve triet*".