Perhaps you should try some spelling variations:
thuat sach » thuat san
thuat lanh » thuat lap, thuat san
dang khai » dang khoi, dang hai, quang khai
hieu van » hieu va, thien van, lieu va
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
khai cua » thai cua, hai cua, khi cua
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
va dang » van dang, va nang, va lang
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) OR (thuat lanh)) ky nang xa hoi. hieu van cac nuoc va dang khai cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) OR (thuat lanh)) ky nang xa hoi. hieu van cac nuoc va dang khai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) OR (thuat lanh)) ky nang xa hoi. hieu van cac nuoc va dang khai cua tu*.