Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thong cong » trong cong, thong thong, phong chong
hoc thieu » toc thieu, hoc hien
tranh vat » trinh vat, tranh va, tranh van
tong cong » trong cong, cong cong, dung cong
ban hang » ngan hang
hang ca » hang va, nang cao, hang tai

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 - canh tranh vat ((thong cong) or (tong cong)) ban hang ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - canh tranh vat ((thong cong) OR (tong cong)) ban hang ca.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - canh tranh vat ((thong cong) or (tong cong)) ban hang ca*.