Perhaps you should try some spelling variations:
vat tinh » sat tinh, vat sinh, hoat tinh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
tinh va » tich va, trinh van, trinh vat
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: su sach ky nang xa 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 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 hoi. hieu ((ve hoc) or (vi hoc)) thuc vat tinh va cua te*.