Perhaps you should try some spelling variations:
quang trach » quang thanh, quang tran
thien hach » thien thanh
hanh trang » thanh trung, canh tranh, hanh trinh
thong cong » trong cong, tong cong, thong thong
cong quang » luong quang, thong quang, duong quang
hien hanh » dieu hanh
trach ban » tranh ban, thach ban, trinh ban
trang va » tran van, hang va
va thong » va thuong, va phuong, he thong

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien hach) OR (hien hanh)) - hanh trang va thong cong quang trach ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien hach) OR (hien hanh)) - hanh trang va thong cong quang trach ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) OR (hien hanh)) - hanh trang va thong cong quang trach ban*.