Perhaps you should try some spelling variations:
te sach » toc sach
cua tre » cua te, cua triet, dua tren
hang vi » hang va, hanh vi, hang di
lo ngan » ly ngan, ro ngan, so ngan
sach ky » sac ky, sach y, sach ty
cuu tre » cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cam lo » nam lo, cam ly, cam o
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((nang ma) or (nang x)) hoi. hieu ve cam lo ngan hang vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang ma) OR (nang x)) hoi. hieu ve cam lo ngan hang vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang ma) or (nang x)) hoi. hieu ve cam lo ngan hang vi ((cua tre) or (cuu tre))*.