Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cham duc » pham duc, cham soc, pham duy
tru nang » tra nang, tri nang, truc nano
dung he » dung cho
danh de » hanh de, dan de, dang de
tu sach » thu sach, su sach, tu cach
hien tu » khien tu, dien tu
te sach » toc sach
tu cham » toc cham, thi cham

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