Perhaps you should try some spelling variations:
trinh vat » trinh van, trinh luat, sinh vat
vat trinh » va trinh, van trinh, viet trinh
su sach » so sach, vu sach
nang xa » lang xa, nang ma, mang xa
vat cua » mat cua, bat cua, dat cua
sach ky » sac ky, sach y, sach ty
vi hoc » li hoc, va hoc
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 trinh vat 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 trinh vat 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 trinh vat cua te*.