Perhaps you should try some spelling variations:
ve triet » va trien, su triet
tru nang » tra nang, tri nang, truc nano
thi cham » thi hai, toc cham, thi ha
danh de » hanh de, dan de, dang de
va danh » va dinh, va dan, va hanh
tu sach » thu sach, su sach, te sach
tu cham » toc cham
da nang » cam nang, kha nang, cao nang

You may be able to get more results by adjusting your search query.

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