Perhaps you should try some spelling variations:
thuat sang » thuat song, thuat san, thuat bang
dang thai » dang thi, dang hai, dang khai
hieu van » thien van, hieu ve
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
thai cua » than cua, tai cuc, tri cua
sang ky » sang kyo, dang ky, tang ky
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
va dang » van dang, va nang, va lang
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: thuat sang ky nang xa hoi. ((((hieu van) or (lieu va))) or (hieu va)) cac nuoc va dang thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sang ky nang xa hoi. ((((hieu van) OR (lieu va))) OR (hieu va)) cac nuoc va dang thai cua te.
• Adding a wildcard symbol may retrieve word variants: thuat sang ky nang xa hoi. ((((hieu van) or (lieu va))) or (hieu va)) cac nuoc va dang thai cua te*.