Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
va danh » va dinh, va dan, va hanh
va tinh » may tinh
so sac » so sach
so dac » so dan
nam tu » nam thu, nam thuc
vi hoa » voi hoa, vi hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sac) or (so dac)) ky tang xa hoi. hieu van nam tu ((va danh) or (va tinh)) vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sac) OR (so dac)) ky tang xa hoi. hieu van nam tu ((va danh) OR (va tinh)) vi hoa viet.
• Adding a wildcard symbol may retrieve word variants: ((so sac) or (so dac)) ky tang xa hoi. hieu van nam tu ((va danh) or (va tinh)) vi hoa viet*.