Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
thanh tung » thanh cong
pha nhung » phai nhuong, tham nhung, phan chung
tung pha » tung pham, trung phan, trung phat
cong van » cong vang, song van, cong tan
cong san » cong tac
chat cau » chat cam, chat cao, chat va

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)) - thanh tung pha nhung ((cong van) or (cong san)) chat cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (thien hach)) - thanh tung pha nhung ((cong van) OR (cong san)) chat cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (thien hach)) - thanh tung pha nhung ((cong van) or (cong san)) chat cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (thien hach)) - thanh tung pha nhung ((cong van) or (cong san)) chat cau*.