Perhaps you should try some spelling variations:
thien van » thi van
van cham » van chat, van tham, va cham
ban hanh » ban hang
cham duc » pham duc, cham soc, pham duy
vai cua » hai cua, lai cua, bai cua
duc ban » duc tan, duc van, dua ban
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
su sach » so sach, vu sach
su sac » su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) OR (su sach)) ky dang ha noi. thien van cham duc ban hanh ((vai cua) or (dai cua)) tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su sach)) ky dang ha noi. thien van cham duc ban hanh ((vai cua) OR (dai cua)) tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su sach)) ky dang ha noi. thien van cham duc ban hanh ((vai cua) or (dai cua)) tuc".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su sach)) ky dang ha noi. thien van cham duc ban hanh ((vai cua) or (dai cua)) tuc*.