Perhaps you should try some spelling variations:
thanh trung » thanh tung
phuong cong » phuong dong, phong cong, phung cong
thieu sach » chieu sach, thien hach, hieu cach
hanh trang » canh tranh, hanh trinh, minh trang
hoc thieu » toc thieu, hoc hien
va phuong » va thuong, cac phuong
cong manh » cong danh, duong manh, cong thanh
toan tai » toan tap, doanh tai, toan cao
toan ban » van 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 thieu sach - ((hanh trang) OR (thanh trung)) va phuong cong manh ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - ((hanh trang) OR (thanh trung)) va phuong cong manh ((toan tai) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - ((hanh trang) OR (thanh trung)) va phuong cong manh ((toan tai) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - ((hanh trang) OR (thanh trung)) va phuong cong manh ((toan tai) or (toan ban))*.