Perhaps you should try some spelling variations:
thieu sach » chieu sach, theo sach, thieu cac
thien hach » thien thanh, hien hanh
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
hieu cach » hieu cac, chieu sach, hieu ca
trang va » tran van, hang va
cong san » cong tac
san phan » san pham, van phan, sat 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: hoc ((((thieu sach) OR (thien hach))) or (hieu cach)) - hanh trang va nhung cong san phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu sach) OR (thien hach))) OR (hieu cach)) - hanh trang va nhung cong san phan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((thieu sach) OR (thien hach))) or (hieu cach)) - hanh trang va nhung cong san phan cau*".