Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thuoc sach » hoc sach, nuoc sach, thuoc sinh
xang dau » hang dau
tinh lap » trinh lap, tinh lao, dinh lap
va triet » va thiet, va trien, ve triet
dau hoi » cau hoi, dai hoi, dan hoi
va pham » van pham, va phat, va phap
va tinh » may tinh
lap va » tap va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) or (thuoc sach)) ty xang dau hoi. lieu va pham duc va tinh lap va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (thuoc sach)) ty xang dau hoi. lieu va pham duc va tinh lap va triet.
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (thuoc sach)) ty xang dau hoi. lieu va pham duc va tinh lap va triet*.