Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
ganh nang » nganh nong, van nang, sach nang
nang chua » nang cua, nang dua, nang thuc
chua dong » cua dong, ha dong, huy dong
dong cong » duong cong, dung cong, dang cong
lang toan » lang thang, lang thanh, quang toan
dang toan » dang tran, dan toan, dung toan

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 - ganh nang chua dong cong ((lang toan) or (dang toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - ganh nang chua dong cong ((lang toan) OR (dang toan)) cao*.