Perhaps you should try some spelling variations:
thuoc dang » thuoc dung, thuoc khang, thuoc cong
thi truong » moi truong
thuoc ban » thuoc tan, thu ban, thuoc ma
khong thi » khoang thi, khong khi, phong thi
hoc sach » hoc sinh, hoc cac
thuc dan » thuc hanh, hoc dan, thuc vat
hoc anh » hoc nganh, hoc nhanh, ngoc anh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (hoc anh)) tien ((thuoc ban) or (((thuoc dang) OR (thuc dan)))) khong thi truong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc anh)) tien ((thuoc ban) OR (((thuoc dang) OR (thuc dan)))) khong thi truong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (hoc anh)) tien ((thuoc ban) or (((thuoc dang) OR (thuc dan)))) khong thi truong".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (hoc anh)) tien ((thuoc ban) or (((thuoc dang) OR (thuc dan)))) khong thi truong*.