Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
hanh trang » thanh trung, canh tranh, minh trang
thieu sach » chieu sach, thien hach, theo sach
hanh trinh » canh tranh, hanh chinh
hieu cach » hieu cac, chieu sach, hieu ca
va phuong » va thuong, cac phuong
cong vang » cong lang, cong quang, cong ngang
vang tuan » van tuan, vong tuan, quang tuan
tuan chau » tran chau, chuan chau, thanh chau

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 (hieu cach)) - ((hanh trang) or (hanh trinh)) va phuong cong vang tuan chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (hieu cach)) - ((hanh trang) OR (hanh trinh)) va phuong cong vang tuan chau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (hieu cach)) - ((hanh trang) or (hanh trinh)) va phuong cong vang tuan chau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (hieu cach)) - ((hanh trang) or (hanh trinh)) va phuong cong vang tuan chau*.