Perhaps you should try some spelling variations:
nghiep co » nghiep cho, nghiep so, nghiep o
hang khoa » dung khoa
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
thoi tap » toi tap, hoc tap, hoi tai
thoi dai » hoc dai, hoi dap, hoi dan
hoc hang » hoc hanh, hoc bang, hoc tang
van tan » van tuan, van ban, van tai
hoi van » hoi va, hoi dan, hai van
mai hoi » mai khoi, dai hoi, lai hoi
tu cach » tu cac
hoc mai » hoc ma, hoc dai, hoc may
co cong » cao cong, cho cong, bo cong
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach ((thoi tap) OR (thoi dai)), nghiep co cong hoc hang khoa hoc mai hoi van tan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach ((thoi tap) OR (thoi dai)), nghiep co cong hoc hang khoa hoc mai hoi van tan van".
• Adding a wildcard symbol may retrieve word variants: tu cach ((thoi tap) OR (thoi dai)), nghiep co cong hoc hang khoa hoc mai hoi van tan van*.