Perhaps you should try some spelling variations:
lanh tranh » canh tranh, lan tranh, hanh trinh
thien hach » thien thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
lanh manh » lan anh, van manh, anh anh
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
va dung » van dung, va duong, vat dung
dan can » dan chan, dan canh, dan ca
can cau » van cau, ban cau, ca cau

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 - ((lanh manh) or (lanh tranh)) va dung cong dan can cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - ((lanh manh) OR (lanh tranh)) va dung cong dan can cau.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - ((lanh manh) or (lanh tranh)) va dung cong dan can cau*.