Perhaps you should try some spelling variations:
nuoc cac » duoc cac, luoc cac, nuoc cap
kyo nang » ky nang, khoi nang, ki nang
hieu van » hieu va, thien van, lieu va
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
dang kyo » dang ky, sang kyo, dang khoi
danh di » danh du, xanh di, danh dien
dan den » ban den, van den, dan dung
so dang » su dang, so dan, so dung
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
dan di » dan da, dan de, dan li
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so dang kyo nang xa hoi. hieu van cac nuoc cac ((((dan di) OR (danh di))) or (dan den)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so dang kyo nang xa hoi. hieu van cac nuoc cac ((((dan di) OR (danh di))) OR (dan den)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so dang kyo nang xa hoi. hieu van cac nuoc cac ((((dan di) OR (danh di))) or (dan den)) cua te*".