Perhaps you should try some spelling variations:
chiet tach » chieu sach
thong cong » trong cong, tong cong, thong thong
hieu cach » hieu cac, chieu sach, hieu ca
vap thong » va thong, van thong, phap thong
cong vap » cong va, cong lap, cong van
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van 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: ho ((((hieu cach) or (chinh sach))) or (chiet tach)) - thanh cong vap thong cong tan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((hieu cach) OR (chinh sach))) OR (chiet tach)) - thanh cong vap thong cong tan phan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((((hieu cach) or (chinh sach))) or (chiet tach)) - thanh cong vap thong cong tan phan cau*.