Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
sach nganh » sach ngan, sach tranh, cac nganh
nganh cong » nhanh chong, thanh cong
nganh lay » nganh xay, nganh luat, nganh mac
toc sach » hoc sach, doc sach, nuoc sach
cong khi » cong thai, khong khi, co khi
lay thai » tay thai, luat thai, vay tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((toc sach) OR (thuoc sach)) nganh cong khi đong luc ) or ( te sach nganh lay thai đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((toc sach) OR (thuoc sach)) nganh cong khi đong luc ) OR ( te sach nganh lay thai đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((toc sach) OR (thuoc sach)) nganh cong khi đong luc ) or ( te sach nganh lay thai đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( ((toc sach) OR (thuoc sach)) nganh cong khi đong luc ) or ( te sach nganh lay thai đong luc ))*.