Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
hoa dang » khoa dang, hoa dan, hoa lang
dang xay » dang van, van xay
thuc van » thuc vat, thuc dan, thuc va
sach hoa » sach ha, sach hoi, bach hoa
te sach » toc sach
tuc van » truc van, tuc va, duc van
cua tuc » cua duc, cua tu, cua thuoc
xay hoi » xa hoi, tay hoi, cay phoi
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach hoa dang xay hoi. hieu ((ve cam) or (vien cac)) ((tuc van) or (thuc van)) hanh vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoa dang xay hoi. hieu ((ve cam) OR (vien cac)) ((tuc van) OR (thuc van)) hanh vi cua tuc.
• Adding a wildcard symbol may retrieve word variants: te sach hoa dang xay hoi. hieu ((ve cam) or (vien cac)) ((tuc van) or (thuc van)) hanh vi cua tuc*.