Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
sach thu » sach thue, sach thieu, sach tham
ve cham » va cham, ve chat, vu cham
duc van » duc va, duc tan, duc manh
tai nha » tai ha, tai ngan, tai khoa
sach ty » sach y, sach tu, xach tay
xang xa » lang xa, mang xa, ang xa
ve cam » ve cac, va cam, ve cai
nuoc » quoc, duoc, ngoc

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 ty) or (sach thu)) xang xa hoi. hieu ((ve cam) OR (ve cham)) duc van hanh tai nha nuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) xang xa hoi. hieu ((ve cam) OR (ve cham)) duc van hanh tai nha nuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach thu)) xang xa hoi. hieu ((ve cam) OR (ve cham)) duc van hanh tai nha nuoc".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach thu)) xang xa hoi. hieu ((ve cam) OR (ve cham)) duc van hanh tai nha nuoc*.