Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
nguoi tay » nguoi thai
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
xuc san » xuc ban, luc sang, nuoc san
benh vi » benh va, benh ve, benh li
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (cac ky)) nang xa hoi. hieu van cam ((xuc san) or (nguoi tay)) benh vi cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (cac ky)) nang xa hoi. hieu van cam ((xuc san) OR (nguoi tay)) benh vi cua thuoc.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (cac ky)) nang xa hoi. hieu van cam ((xuc san) or (nguoi tay)) benh vi cua thuoc*.