Perhaps you should try some spelling variations:
thiet hach » thien hach, thuyet hach, thiet hai
lang thang » dang thanh, hung thang, lang trong
cang thang » cong thanh, dang thanh
phung cong » nhung cong, phong cong, nhung chong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
va phung » va phuong, van phung, va nhung
cong dan » cong san, cong tan, huong dan
van chat » cao chat
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet hach - ((lang thang) or (cang thang)) va phung cong dan van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet hach - ((lang thang) OR (cang thang)) va phung cong dan van chat.
• Adding a wildcard symbol may retrieve word variants: hoc thiet hach - ((lang thang) or (cang thang)) va phung cong dan van chat*.