Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
vu khach » vu khanh, vu khac, vay khach
thanh vi » hanh vi, thanh va, thanh ve
tru nang » tra nang, tri nang, truc nano
luu tre » luu tru, luy tre
xuc van » duc van, luc van, vuc van
hai xuc » hai cuc, hai xu, chat xuc
qua hai » qua hoat
tu nang » tu nong, tu nano, tu lang
cuu tre » cua tre, cau tren, cau treo

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

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