Perhaps you should try some spelling variations:
duong vanh » duong van, duong manh, duong xanh
mot chieu » doi chieu
canh sinh » canh tinh, canh binh, tinh sinh
vanh tuan » anh tuan, van tuan, manh tuan
ho chieu » theo chieu, hoc thieu, doi chieu
van dang » van dong, van dung, van nang
vat dung » van dung, va dung, viet dung
tuan tap » toan tap, tuan tai, tuyen tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (mot chieu)) xanh - canh sinh ((van dang) or (vat dung)) duong vanh tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (mot chieu)) xanh - canh sinh ((van dang) OR (vat dung)) duong vanh tuan tap.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (mot chieu)) xanh - canh sinh ((van dang) or (vat dung)) duong vanh tuan tap*.