Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
tran anh » tran manh, tuan anh, tran thanh
cau treo » cau theo, cau tren, cau triet
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
bao duc » dao duc, bao luc, cao duc
cuu tre » cua tre, cau tren
tan anh » tuan anh, toan anh, van anh
ma hoi » mai hoi, xa hoi, ma hoa
ve bao » te bao, va bao
lanh y » anh y, hanh y, lanh lay
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 bao duc ((tan anh) or (tran anh)) bai ((cuu tre) OR (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh y tang ma hoi. hieu ve bao duc ((tan anh) OR (tran anh)) bai ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat lanh y tang ma hoi. hieu ve bao duc ((tan anh) or (tran anh)) bai ((cuu tre) OR (cau treo))".
• Adding a wildcard symbol may retrieve word variants: thuat lanh y tang ma hoi. hieu ve bao duc ((tan anh) or (tran anh)) bai ((cuu tre) OR (cau treo))*.