Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
van hanh » van thanh, ban hanh, van anh
ty hang » ly hang, ty xang, thi hang
hanh va » hang va, hanh vi
yu hang » yu zhang, yu pang, yu wang
duc van » duc va, duc tan, duc manh
qua cua » quan cua, quang cua, qua quan
va cua » va chua, via cua, ca cua
cua tu » cua tuc, cua su, cua cu
qua ca » qua cac, qua cai, quan cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat lanh ((ty hang) or (yu hang)) cau hoi. hieu ((qua ca) or (qua cua)) duc van hanh va cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh ((ty hang) OR (yu hang)) cau hoi. hieu ((qua ca) OR (qua cua)) duc van hanh va cua tu.
• Adding a wildcard symbol may retrieve word variants: thuat lanh ((ty hang) or (yu hang)) cau hoi. hieu ((qua ca) or (qua cua)) duc van hanh va cua tu*.