Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
thanh tap » thanh tai, thanh tay, thanh tam
thanh lap » thanh san, phan lap, thanh hai
hong van » hoang van, thong van, phong van

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 - hanh trinh cua nhung ((huong dan) or (hong van)) ((thanh tap) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trinh cua nhung ((huong dan) OR (hong van)) ((thanh tap) OR (thanh lap)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trinh cua nhung ((huong dan) or (hong van)) ((thanh tap) or (thanh lap))*.