Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
tang hanh » tang thanh, dang hanh, nang hanh
duc tang » duc thang, duc tan, tuc tang
hanh lai » hanh lam, hanh tai, thanh lap
mang xa » lang xa, mang may, dang xay
sach ty » sach tu, sach thu, xach tay
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
lai cua » dai cua, hai cua, lai chau
va cam » va cham, va cac, va cao
ang xa » lang xa, dang xay, hoang xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) OR (sach y)) ((ang xa) or (mang xa)) hoi. hieu va cam duc tang hanh lai cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach y)) ((ang xa) OR (mang xa)) hoi. hieu va cam duc tang hanh lai cua thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach y)) ((ang xa) or (mang xa)) hoi. hieu va cam duc tang hanh lai cua thuoc".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach y)) ((ang xa) or (mang xa)) hoi. hieu va cam duc tang hanh lai cua thuoc*.