Perhaps you should try some spelling variations:
dua tren » dung tren
cham duc » pham duc, cham soc, pham duy
la tren » loai tren, dat tren, dau tren
tinh ve » trinh ve, tinh ven, dinh ve
va tinh » may tinh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
lang xa » lang ha, dang xay, lang van
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((lang xa) or (nang x)) hoi. hieu ve cham duc va tinh ve ((la tren) or (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((lang xa) OR (nang x)) hoi. hieu ve cham duc va tinh ve ((la tren) OR (dua tren)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((lang xa) or (nang x)) hoi. hieu ve cham duc va tinh ve ((la tren) or (dua tren))*.