Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung dung » phuong dung, ung dung, trung dung
thong dung » thong cong, thong thuong
theo yeu » theo tieu, thiet yeu, theo chu
khao cuu » cham cuu, chao chu, kho cua
trinh va » trinh van, trinh vat, trinh ve
tai tuan » tri tuan, ta tuan, tai quan
tuan ban » tuan bang, toan ban, luan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo yeu) or (khao cuu)) tinh - hanh trinh va ((nhung dung) OR (thong dung)) tai tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo yeu) OR (khao cuu)) tinh - hanh trinh va ((nhung dung) OR (thong dung)) tai tuan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo yeu) or (khao cuu)) tinh - hanh trinh va ((nhung dung) OR (thong dung)) tai tuan ban".
• Adding a wildcard symbol may retrieve word variants: ((theo yeu) or (khao cuu)) tinh - hanh trinh va ((nhung dung) OR (thong dung)) tai tuan ban*.