Perhaps you should try some spelling variations:
thuat mach » thuat sach, thuat tach, thuyet mach
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan thong » quang thong, quan trong, xuan thong
thong dan » thong van, tuong dan, thong den
ki thuat » ky thuat
trong ca » trong cac, trong nha
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ki thuat mach - hanh trinh quan thong ((trong ca) or (thong dan)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ki thuat mach - hanh trinh quan thong ((trong ca) OR (thong dan)) toan ban*.