Perhaps you should try some spelling variations:
xang chung » bang chung, dang hung, dung chung
chung hoc » trung hoc, dung hoc, hung hoa
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
tu xang » ty xang, tu lang, tu quang
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
doi cua » dai cua, hoi cua
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) OR (toc sach)) tu xang chung hoc. hieu va cac xuc van hanh ((vi cua) or (doi cua)) cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) tu xang chung hoc. hieu va cac xuc van hanh ((vi cua) OR (doi cua)) cac*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) tu xang chung hoc. hieu va cac xuc van hanh ((vi cua) or (doi cua)) cac*".