Perhaps you should try some spelling variations:
thuoc sai » thuoc tai, thuoc san, thuoc sach
thanh lai » thanh hai, thanh lap, thanh loi
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 tang, duy sang
ky dang » ky nang, ky danh
tao hoi » tao khoi, tao boi, tay hoi
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 sai ((ky sang) OR (ky dang)) tao hoi. hieu van pham duc va thanh lai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sai ((ky sang) OR (ky dang)) tao hoi. hieu van pham duc va thanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sai ((ky sang) OR (ky dang)) tao hoi. hieu van pham duc va thanh lai cua te*.