Perhaps you should try some spelling variations:
thi cham » thi hai, toc cham, thi ha
luu tre » luu tru, cuu tre, luy tre
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
ve cham » ve chat, vu cham, ve chim
cua dan » cua dang, cua ban, ca dan
va cham » va chat, va tham
vi luu » vi lua
dan vi » doan vi, don vi, dan va
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky dang ha hoi. hieu ((((ve cham) OR (va cham))) or (thi cham)) hoc cua dan vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky dang ha hoi. hieu ((((ve cham) OR (va cham))) OR (thi cham)) hoc cua dan vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky dang ha hoi. hieu ((((ve cham) OR (va cham))) or (thi cham)) hoc cua dan vi luu tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky dang ha hoi. hieu ((((ve cham) OR (va cham))) or (thi cham)) hoc cua dan vi luu tre*.