Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
toc sach » hoc sach, doc sach, thuoc sach
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
vu sach » vu bach, su sach, vu khach
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
vai su » va su, van su, lai su
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) or (toc sach))) or (vu sach)) ky nang ma hoi. hieu ve cam xuc va hanh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (toc sach))) OR (vu sach)) ky nang ma hoi. hieu ve cam xuc va hanh vai su triet.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (toc sach))) or (vu sach)) ky nang ma hoi. hieu ve cam xuc va hanh vai su triet*.