Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
trong tan » trong quan, trong cac, trong ca
thu sach » tu sach, thuoc sach, thu hoach
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
tan phan » toan phan, than phan, van phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((thu sach) or (thuat sach)) - canh tranh ((cua dung) OR (qua dung)) trong tan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((thu sach) OR (thuat sach)) - canh tranh ((cua dung) OR (qua dung)) trong tan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((thu sach) or (thuat sach)) - canh tranh ((cua dung) OR (qua dung)) trong tan phan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((thu sach) or (thuat sach)) - canh tranh ((cua dung) OR (qua dung)) trong tan phan cau*.