Perhaps you should try some spelling variations:
cay thuoc » cua thuoc, nam thuoc, va thuoc
hieu viec » nhieu viec, hieu ve, sieu viet
vat thanh » dat thanh, gat thanh, tat thanh
cay thuc » can thuc, day thuc, cach thuc
thanh vi » hanh vi, thanh va, thanh ve
luu tre » luu tru, cuu tre
vu sach » vu bach, su sach, vu khach
luy tre » luyen tre
hang xa » hoang xa, hang va, hang ca
y hang » ly hang, ty hang, yu hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y hang xa hoi. hieu viec ((cay thuc) OR (cay thuoc)) vat thanh vi ((luu tre) or (luy tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y hang xa hoi. hieu viec ((cay thuc) OR (cay thuoc)) vat thanh vi ((luu tre) OR (luy tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y hang xa hoi. hieu viec ((cay thuc) OR (cay thuoc)) vat thanh vi ((luu tre) or (luy tre))".
• Adding a wildcard symbol may retrieve word variants: vu sach y hang xa hoi. hieu viec ((cay thuc) OR (cay thuoc)) vat thanh vi ((luu tre) or (luy tre))*.