Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
van hanh » van thanh, ban hanh, van anh
thu hang » thi hang, thuc hanh, thu huong
viec cac » vien cac, viec cua, viec lam
te sach » toc sach
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
cho hoc » co hoc, khoa hoc
tu hung » tu chung, tu nhung, tu vung
tu hang » tu hanh, ty hang, te hang
cua cay » cua cac
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 ((((tu hang) OR (thu hang))) or (tu hung)) cho hoc. hieu viec cac xuc van hanh vi cua cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((((tu hang) OR (thu hang))) OR (tu hung)) cho hoc. hieu viec cac xuc van hanh vi cua cay*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((((tu hang) OR (thu hang))) or (tu hung)) cho hoc. hieu viec cac xuc van hanh vi cua cay*".