Perhaps you should try some spelling variations:
chan khoa » nhan khoa, chai khoa, chat khoa
nuoc sach » nguoi sach, hoc sach, cuoc cach
tran chai » tran chau, tran chi, tranh chap
dan chan » dan gian, dan ca, van chat
khoa hoc » hoa hoc
tran hai » tran bai, tran chau, tran nhat
thu xac » thau xay
xac dan » cac dan, bac dan, sac dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu xac dan chan khoa hoc ) or ( nuoc sach ((tran chai) OR (tran hai)) khoa hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu xac dan chan khoa hoc ) OR ( nuoc sach ((tran chai) OR (tran hai)) khoa hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thu xac dan chan khoa hoc ) or ( nuoc sach ((tran chai) OR (tran hai)) khoa hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( thu xac dan chan khoa hoc ) or ( nuoc sach ((tran chai) OR (tran hai)) khoa hoc ))*.