Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tang cua » mang cua, hang cua, thong cua
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
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: hoc thieu sach - hanh ((tang cua) or (((tang luan) OR (dung luan)))) nhung cong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh ((tang cua) OR (((tang luan) OR (dung luan)))) nhung cong van toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh ((tang cua) or (((tang luan) OR (dung luan)))) nhung cong van toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh ((tang cua) or (((tang luan) OR (dung luan)))) nhung cong van toan cao*.