Perhaps you should try some spelling variations:
tru nang » tra nang, truc nano, thi nang
tri nang » thi nang, tra nang, tri bang
tu sach » thu sach, su sach, te sach
danh va » doanh va, hanh va, anh va
va danh » va dinh, va dan, va hanh
va cua » va chua, via cua, ca cua
ve cao » ve bao, ve cac, ve co
va cao » va cac, va co, va dao
cua te » cua tu

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