Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
van hanh » van thanh, ban hanh, van anh
hanh tai » thanh tai, hang tai, han tai
lanh ty » lanh tu, canh tay, lanh tho
nang ma » tang ma, sang ma, mang may
hieu vu » hieu va, hieu ve, hieu su
vu khao » va khao, vu kham, vu khac
khao ly » khanh ly
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
ly van » le van, ly va, ly von

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 ((nang ma) OR (nang cao)) hoi. hieu vu khao ly van hanh tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat lanh ty ((nang ma) OR (nang cao)) hoi. hieu vu khao ly van hanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat lanh ty ((nang ma) OR (nang cao)) hoi. hieu vu khao ly van hanh tai cua tre*.