Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
sinh vati » sinh va, sinh dai, dinh vat
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
duc van » duc tan, duc manh, duc phan
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, xa hoi, ma hoa
ve cao » va cao, ve bao, ve cac

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