Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
hieu ve » hieu va, hieu van
ve giao » te giao, viet giao, van giao
duc van » duc va, duc tan, duc manh
minh ai » minh hai, minh lai, minh tai
minh va » tinh va, sinh va, sinh vat
cua tre » cua te, cuu tre, cua triet
lanh y » anh y, hanh y, lanh lay
y sang » _ sang, duy sang
ma hoi » mai hoi, ma hoa, me hoi

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 y sang ((ma hoi) or (xa hoi)). hieu ve giao duc van ((minh ai) or (minh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh y sang ((ma hoi) OR (xa hoi)). hieu ve giao duc van ((minh ai) OR (minh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat lanh y sang ((ma hoi) or (xa hoi)). hieu ve giao duc van ((minh ai) or (minh va)) cua tre*.