Perhaps you should try some spelling variations:
sach nganh » sach ngan, sach tranh, cac nganh
nganh cong » nhanh chong, thanh cong
sach tham » sach nha
hoa thai » hong thai, hoa phan, hoa chat
toc sach » hoc sach, doc sach, thuoc sach
cong khi » cong thai, khong khi, co khi
hoa phi » hoa phan

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

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