Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
hanh doi » thanh doi, hanh noi, hang doi
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
doi cua » dai cua, hoi cua
duc ban » duc tan, duc van, dua ban
cau duc » cao duc, cau luc, chu duc
van cau » van dau, van hau, van chat
mai hoi » mai khoi, dai hoi, lai hoi
ma hoi » xa hoi, ma hoa, me hoi
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: ((tu sach) or (thuat san)) ky nang ((ma hoi) or (mai hoi)). hieu van cau duc ban hanh doi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat san)) ky nang ((ma hoi) OR (mai hoi)). hieu van cau duc ban hanh doi cua tu.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat san)) ky nang ((ma hoi) or (mai hoi)). hieu van cau duc ban hanh doi cua tu*.