Perhaps you should try some spelling variations:
dau tieng » dau tien, cau tieng, day tieng
van hanh » van thanh, ban hanh, van anh
sach cay » sach cap, sach hay, sach nay
xuc van » duc van, luc van, vuc van
cau xuc » cam xuc, cau luc, cau truc
tu sach » thu sach, su sach, te sach
mang xa » lang xa, dang xay, mang cua
hieu va » hieu qua
vi dau » vi dai, va dau, bi dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach cay ((mang xa) or (mang may)) hoi. ((hieu va) or (lieu va)) cau xuc van hanh vi dau tieng~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach cay ((mang xa) OR (mang may)) hoi. ((hieu va) OR (lieu va)) cau xuc van hanh vi dau tieng.
• Adding a wildcard symbol may retrieve word variants: tu sach cay ((mang xa) or (mang may)) hoi. ((hieu va) or (lieu va)) cau xuc van hanh vi dau tieng*.