Perhaps you should try some spelling variations:
thiet hach » thien hach, thuyet hach, thiet hai
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trinh dap » trinh lap, trinh da, trinh dan
dap nhung » vap nhung, va nhung, dap ung
cong san » cong tac
san khau » san pham, san khoa, san phu
khau cap » khan cap, khau cao, khau tap

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 - hanh trinh dap nhung cong san khau cap~.
• Adding a wildcard symbol may retrieve word variants: hoc thiet hach - hanh trinh dap nhung cong san khau cap*.