Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
dinh thai » dinh thi, sinh thai, hinh thai
tinh thai » sinh thai, tinh toan, tinh chat
khoa hoc » hoa hoc
sach dao » lanh dao
hoi khoa » hoc khoa, noi khoa, tai khoa
dao hoi » dao thoi, dai hoi, dao ho
tu van » tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu van ((dinh thai) OR (tinh thai)) khoa hoc ) or ( thuat sach dao hoi khoa hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu van ((dinh thai) OR (tinh thai)) khoa hoc ) OR ( thuat sach dao hoi khoa hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu van ((dinh thai) OR (tinh thai)) khoa hoc ) or ( thuat sach dao hoi khoa hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( tu van ((dinh thai) OR (tinh thai)) khoa hoc ) or ( thuat sach dao hoi khoa hoc ))*.