Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
trung cong » truong cong, trong cong, trung uong
tang luan » dung luan
thu sach » tu sach, thuoc sach, thu hoach
tang cua » mang cua, hang cua, thong cua
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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)) - hanh ((tang cua) or (tang luan)) trung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((thu sach) OR (thuat sach)) - hanh ((tang cua) OR (tang luan)) trung cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((thu sach) OR (thuat sach)) - hanh ((tang cua) or (tang luan)) trung cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((thu sach) OR (thuat sach)) - hanh ((tang cua) or (tang luan)) trung cong san toan cao*.