Perhaps you should try some spelling variations:
thuoc sac » thuoc sach, thuoc dac, thuoc sai
thanh lai » thanh hai, thanh lap, thanh loi
tao khoi » tao hoi, thao khoa, lao khoa
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
va thanh » gia thanh, ban thanh, va tinh
ky sang » ky nang, ky dang, duy sang
ky tang » ky nang, ky dang, kho tang
lai cua » dai cua, hai cua, lai chau
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 sang) OR (ky tang)) tao khoi. hieu van pham duc va thanh lai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sac ((ky sang) OR (ky tang)) tao khoi. hieu van pham duc va thanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sac ((ky sang) OR (ky tang)) tao khoi. hieu van pham duc va thanh lai cua te*.