Perhaps you should try some spelling variations:
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
hang cong » dang cong, hang nong, bang cong
cong tinh » cong trinh, cong vinh, long tinh
toan ban » van ban
va hang » van hang, va nang, va lang

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 hang cong tinh toan ban~.
• 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 hang cong tinh toan ban.
• 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 hang cong tinh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (hieu cach)) - ((hanh trang) or (hanh trinh)) va hang cong tinh toan ban*.