Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hieu cach » chieu sach, hieu ca, biet cach
lang cong » dang cong, bang cong, hang cong
hieu cac » hieu luc, hieu va, hieu van
trang va » tran van, hang va
van tuan » van quan, van ban, anh tuan
va lang » va nang, hoa lang
van tan » van ban, van tai, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu cach) OR (hieu cac)) - hanh trang va lang cong ((van tuan) or (van tan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cach) OR (hieu cac)) - hanh trang va lang cong ((van tuan) OR (van tan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu cach) OR (hieu cac)) - hanh trang va lang cong ((van tuan) or (van tan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) OR (hieu cac)) - hanh trang va lang cong ((van tuan) or (van tan)) cau*.