Perhaps you should try some spelling variations:
cuu thuoc » cua thuoc, cuu thuc, cay thuoc
hieu van » hieu va, thien van, lieu va
dan hanh » dang hanh, dan khanh, dan thanh
hanh te » hanh tu, hanh ve, hanh de
cuu hoc » cua hoc, cuu khoa, cuu duoc
sach ky » sac ky, sach y, sach kem
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
te cua » tue cua, le cua, de 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) or (sach ty)) nang xa hoi. hieu van ((cuu hoc) OR (cuu thuoc)) dan hanh te cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang xa hoi. hieu van ((cuu hoc) OR (cuu thuoc)) dan hanh te cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sach ty)) nang xa hoi. hieu van ((cuu hoc) OR (cuu thuoc)) dan hanh te cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach ty)) nang xa hoi. hieu van ((cuu hoc) OR (cuu thuoc)) dan hanh te cua te*.