Perhaps you should try some spelling variations:
van chat » cao chat
hieu van » hieu va, thien van, lieu va
ban hang » ngan hang
tru nang » tra nang, tri nang, truc nano
chat cua » nhat cua, chat va, chat huu
cua tre » cua te, cua triet, dua tren
hang vi » hang va, hanh vi, hang di
tu sach » thu sach, su sach, te sach
tu nang » tu nong, tu nano, tu lang
cuu 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: tu sach ((tu nang) OR (tru nang)) xa hoi. hieu van chat cua ban hang vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tu nang) OR (tru nang)) xa hoi. hieu van chat cua ban hang vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tu nang) OR (tru nang)) xa hoi. hieu van chat cua ban hang vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tu nang) OR (tru nang)) xa hoi. hieu van chat cua ban hang vi ((cua tre) or (cuu tre))*.