Perhaps you should try some spelling variations:
vat tinh » sat tinh, vat sinh, hoat tinh
su sach » so sach, vu sach
nang xa » lang xa, nang ma, mang xa
tinh va » tich va, trinh van, trinh vat
sach ky » sac ky, sach y, sach ty
vi hoc » li hoc, va hoc
va cua » va chua, via cua, ca cua
ve hoc » te hoc, va hoc, de hoc
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: su sach ky ((nang xa) OR (nang x)) hoi. hieu ((ve hoc) or (vi hoc)) thuc vat tinh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (nang x)) hoi. hieu ((ve hoc) OR (vi hoc)) thuc vat tinh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) OR (nang x)) hoi. hieu ((ve hoc) or (vi hoc)) thuc vat tinh va cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) OR (nang x)) hoi. hieu ((ve hoc) or (vi hoc)) thuc vat tinh va cua te*.