Perhaps you should try some spelling variations:
thien van » thi van
thu sach » thuat sach, thuoc sach, thu hoach
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
cau tren » cu tren, dau tren, ca tren
tu sach » su sach, te sach, tu cach
nam dua » nam da, nam cua, nam mua
dua ban » dia ban, cua ban, qua ban
vai cau » va cau, van cau, vai cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (tu sach)) ky nang ((xa hoi) or (ma hoa)). thien van nam dua ban hanh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ky nang ((xa hoi) OR (ma hoa)). thien van nam dua ban hanh vai cau tren.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) ky nang ((xa hoi) or (ma hoa)). thien van nam dua ban hanh vai cau tren*.