Perhaps you should try some spelling variations:
tru nang » tra nang, tri nang, truc nano
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
van cam » van nam, van lam, van cau
xuc van » duc van, luc van, xuc ban
tu nang » tu nong, tu nano, tu lang
tu sach » thu sach, su sach, te sach
vi cau » va cau, ve cau, viet cau
di cau » da cau, diem cau

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 ((tu nang) OR (tru nang)) xa hoi. hieu van cam xuc van hanh ((vi cau) OR (di cau)) treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tu nang) or (tru nang)) xa hoi. hieu van cam xuc van hanh ((vi cau) OR (di cau)) treo~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tu nang) or (tru nang)) xa hoi. hieu van cam xuc van hanh ((vi cau) OR (di cau)) treo*.