Perhaps you should try some spelling variations:
khach san » khach hang, thanh san
dau tren » dau tien, dat tren, dau tieng
van cham » van chat, van tham, va cham
cham luc » cham soc, nhan luc, cham cuu
hieu van » hieu va, thien van, lieu va
dang mai » dang hai, dang mau, dang bai
mai hoi » mai khoi, dai hoi, lai hoi
hanh va » hang va, hanh vi
cu tren » tu tren, dua tren
tu sach » thu sach, su sach, te sach
luc va » duc va, tuc va, loc va
y dang » ky dang, 2 dang, _ dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y dang mai hoi. hieu van cham luc va ((khach san) or (hanh va)) ((cu tren) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y dang mai hoi. hieu van cham luc va ((khach san) OR (hanh va)) ((cu tren) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: tu sach y dang mai hoi. hieu van cham luc va ((khach san) or (hanh va)) ((cu tren) or (dau tren))*.