Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
dua tren » dung tren
anh dai » vanh dai, anh bai, anh dat
tan anh » tuan anh, tran anh, toan anh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
tang ma » tang van
lanh y » anh y, hanh y, lanh lay
ve cac » va cac, vien cac
cua te » cua tu

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) or (mang may)) hoa. hieu ve cac duc tan anh dai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh y ((tang ma) OR (mang may)) hoa. hieu ve cac duc tan anh dai ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: thuat lanh y ((tang ma) or (mang may)) hoa. hieu ve cac duc tan anh dai ((dua tren) or (cua te))*.