Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
minh vai » minh va, minh hai, minh ai
dao duc » giao duc
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
lanh y » anh y, hanh y, lanh lay
ma hoi » mai hoi, xa hoi, ma hoa
y tang » ky tang, 6 tang, 7 tang

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 tang ma hoi. hieu ve ((dao duc) or (tao duoc)) van minh vai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh y tang ma hoi. hieu ve ((dao duc) OR (tao duoc)) van minh vai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat lanh y tang ma hoi. hieu ve ((dao duc) or (tao duoc)) van minh vai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thuat lanh y tang ma hoi. hieu ve ((dao duc) or (tao duoc)) van minh vai ((cua tre) OR (cuu tre))*.