Perhaps you should try some spelling variations:
thien van » thi van
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
tu sach » thu sach, su sach, te sach
cua tre » cua te, cua triet, dua tren
duc ban » duc tan, duc van, dua ban
lam duc » lam duoc, pham duc, nam duoc
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
cuu tre » cau tren, cau treo
sach 2 » sach y
ma hoi » mai hoi, xa hoi, ma hoa
2 nang » v nang

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 2 nang ma hoi. ((hieu va) or (thien van)) lam duc ban thanh vai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach 2 nang ma hoi. ((hieu va) OR (thien van)) lam duc ban thanh vai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach 2 nang ma hoi. ((hieu va) or (thien van)) lam duc ban thanh vai ((cua tre) or (cuu tre))*.