Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
thu sach » thuat sach, thuoc sach, thu hoach
tra nang » thi nang, kha nang, da nang
tu sach » su sach, te sach, tu cach
dang de » dang deo, dung de, dang do
danh di » danh du, xanh di, danh dien
tu cham » toc cham, thi cham
hien tu » khien tu, dien tu
su viet » so viet
x hoi » xa hoi, o hoi, x ho

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 (thu sach)) tra nang x hoi. hien tu cham duc va ((danh di) or (dang de)) su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) tra nang x hoi. hien tu cham duc va ((danh di) OR (dang de)) su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) tra nang x hoi. hien tu cham duc va ((danh di) or (dang de)) su viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) tra nang x hoi. hien tu cham duc va ((danh di) or (dang de)) su viet*.