Perhaps you should try some spelling variations:
vat tich » vat lich, va tich, mat tich
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
ve hoc » te hoc, va hoc, de hoc
vi hoc » li hoc, va hoc
va cua » va chua, via cua, ca cua
cua te » cua tu

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 ky ((nang xa) or (nang x)) hoi. hieu ((ve hoc) or (vi hoc)) thuc vat tich va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((nang xa) OR (nang x)) hoi. hieu ((ve hoc) OR (vi hoc)) thuc vat tich va cua te.
• Adding a wildcard symbol may retrieve word variants: so sach ky ((nang xa) or (nang x)) hoi. hieu ((ve hoc) or (vi hoc)) thuc vat tich va cua te*.