Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
nam duoc » nam thuoc, da duoc, dat duoc
duoc may » duoc ma, duoc ly, hoc may
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay
da cau » dat cau, va cau
da cua » dai cua, day cua, dan cua
x hoi » xa hoi, o hoi, x ho
da ca » dan ca, va ca, da co

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sac ky nang x hoi. lieu va nam duoc may tinh ((((da ca) OR (da cau))) or (da cua)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sac ky nang x hoi. lieu va nam duoc may tinh ((((da ca) OR (da cau))) OR (da cua)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sac ky nang x hoi. lieu va nam duoc may tinh ((((da ca) OR (da cau))) or (da cua)) tren".
• Adding a wildcard symbol may retrieve word variants: thuat sac ky nang x hoi. lieu va nam duoc may tinh ((((da ca) OR (da cau))) or (da cua)) tren*.