Perhaps you should try some spelling variations:
thuoc sai » thuoc tai, thuoc san, thuoc sach
thanh lai » thanh hai, thanh lap, thanh loi
nang lao » nang cao, nang tao, nang lam
nang dao » nang cao, nang dau, nang tao
phan dau » phan tu, hang dau
va thanh » gia thanh, ban thanh, va tinh
hieu ve » hieu va, hieu van
ve phan » va phan, ke phan, ve phat
lai cua » dai cua, hai cua, lai chau
dau va » dau ve, lau va
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sai) or (toc san)) ky ((nang lao) or (nang dao)) khoa. hieu ve phan dau va thanh lai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sai) OR (toc san)) ky ((nang lao) OR (nang dao)) khoa. hieu ve phan dau va thanh lai cua tu.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sai) or (toc san)) ky ((nang lao) or (nang dao)) khoa. hieu ve phan dau va thanh lai cua tu*.