Perhaps you should try some spelling variations:
thien van » thi van
cau tren » cu tren, dau tren, ca tren
thanh vi » hanh vi, thanh va, thanh ve
tru nang » tra nang, tri nang, truc nano
luc van » luoc van, luu van, duc van
xuc van » duc van, vuc van, xuc ban
su sach » so sach, vu sach
tu nang » tu nong, tu nano, tu lang
van cau » van dau, van hau, van chat
vi cau » va cau, ve cau, di cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((tu nang) or (tru nang)) xa hoi. thien van cau ((xuc van) OR (luc van)) thanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tu nang) OR (tru nang)) xa hoi. thien van cau ((xuc van) OR (luc van)) thanh vi cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tu nang) or (tru nang)) xa hoi. thien van cau ((xuc van) OR (luc van)) thanh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: su sach ((tu nang) or (tru nang)) xa hoi. thien van cau ((xuc van) OR (luc van)) thanh vi cau tren*.