Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thien hach » thien thanh, hien hanh
hanh trinh » canh tranh, hanh chinh
trinh han » trinh quan
han chung » phan chung, han chang, van chuong
luong van » luong va, duong van, luong vat
hong van » hoang van, thong van, phong van
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (thien hach)) - hanh trinh han chung ((luong van) or (hong van)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (thien hach)) - hanh trinh han chung ((luong van) OR (hong van)) toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (thien hach)) - hanh trinh han chung ((luong van) or (hong van)) toan tap*.