Perhaps you should try some spelling variations:
thuoc sac » thuoc sach, thuoc dac, thuoc sai
hanh tai » thanh tai, hang tai, han tai
hanh dai » hanh dao, vanh dai, thanh dat
hieu ve » hieu va, hieu van
cam cac » ca cac, nam cac, cam chan
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky
ma hoi » mai hoi, ma hoa, me hoi
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: thuoc sac ky nang ((ma hoi) OR (xa hoi)). hieu ve cam cac dan ((hanh dai) or (hanh tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sac ky nang ((ma hoi) OR (xa hoi)). hieu ve cam cac dan ((hanh dai) OR (hanh tai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sac ky nang ((ma hoi) OR (xa hoi)). hieu ve cam cac dan ((hanh dai) or (hanh tai)) cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sac ky nang ((ma hoi) OR (xa hoi)). hieu ve cam cac dan ((hanh dai) or (hanh tai)) cua te*.