Perhaps you should try some spelling variations:
doan thien » hoan thien, doan thi, toan thiet
va thanh » gia thanh, ban thanh, va tinh
cham xuc » cam xuc, chat xuc, cham soc
vi doan » vi toan, voi doanh, thi doan
va hanh » van hanh, va danh, ban hanh
hieu ve » hieu va, hieu van
tu sach » thu sach, te sach, tu cach
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
su sach » so sach, vu sach
ve cham » va cham, ve chat, vu cham
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 (su sach)) ky sang ma hoi. hieu ve cham xuc ((va hanh) or (va thanh)) vi doan thien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky sang ma hoi. hieu ve cham xuc ((va hanh) OR (va thanh)) vi doan thien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky sang ma hoi. hieu ve cham xuc ((va hanh) or (va thanh)) vi doan thien".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky sang ma hoi. hieu ve cham xuc ((va hanh) or (va thanh)) vi doan thien*.