Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ve thanh » le thanh, de thanh, den thanh
dua tren » dung tren
cua tre » cua te, cua triet, cua thep
sach tu » sach thu, cach tu, sach ty
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
cuu tre » cau tren, cau treo
cuu ve » cuu va
ve cap » ve cac, le cap, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach tu nang xa hoi. hieu ve cap cuu ve thanh vai ((((cua tre) OR (dua tren))) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tu nang xa hoi. hieu ve cap cuu ve thanh vai ((((cua tre) OR (dua tren))) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach tu nang xa hoi. hieu ve cap cuu ve thanh vai ((((cua tre) OR (dua tren))) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: so sach tu nang xa hoi. hieu ve cap cuu ve thanh vai ((((cua tre) OR (dua tren))) or (cuu tre))*.