Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang van » hoang van, hang va
nam thuc » nam thuoc, am thuc, nam thu
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
dua tren » dung tren
bach ky » bac ky
lang xa » lang ha, dang xay, lang van
qua nam » quan nam, cua nam, quang nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ky ((lang xa) or (dang van)) hoi. hieu qua nam thuc dan hanh vi ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ky ((lang xa) OR (dang van)) hoi. hieu qua nam thuc dan hanh vi ((dua tren) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: vu bach ky ((lang xa) or (dang van)) hoi. hieu qua nam thuc dan hanh vi ((dua tren) or (cua triet))*.