Perhaps you should try some spelling variations:
ngoc ngoai » nuoc ngoai, hoc ngoai, ngoc ngoc
trong thoi » trong thi, trong trot, trong thu
trong tho » trong thu, trong thi, trong trot
tac pham » thuc pham, san pham
hoc ngoc » hoc nuoc, ho ngoc, loc ngoc
van hoc » van hoa
gia, » giao,

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

• Performing a fuzzy search may retrieve terms with similar spellings: tac gia, tac pham van hoc ngoc ngoai ((trong thoi) or (trong tho)) truong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tac gia, tac pham van hoc ngoc ngoai ((trong thoi) OR (trong tho)) truong.
• Adding a wildcard symbol may retrieve word variants: tac gia, tac pham van hoc ngoc ngoai ((trong thoi) or (trong tho)) truong*.