Perhaps you should try some spelling variations:
trinh nghien » trinh nghe, kinh nghiem, trinh thiet
thuat lanh » thuat lap, thuat san
lanh trinh » hanh trinh, anh trinh, lanh tranh
nghien hu » nghien cuu, nghiep phu, nghiep vu
sach trai » sach tranh, khach trai, sach tham
sach tai » sach bai, sach tham, sach dao
nghiem d » nghiem de, nghiem do, nghiem _
hu hoc » huy hoc, thu hoc, tu hoc
d hoc » du hoc, ad hoc, de hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thuat lanh trinh nghien hu hoc ) or ( thu ((sach trai) OR (sach tai)) nghiem d hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuat lanh trinh nghien hu hoc ) OR ( thu ((sach trai) OR (sach tai)) nghiem d hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thuat lanh trinh nghien hu hoc ) or ( thu ((sach trai) OR (sach tai)) nghiem d hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( thuat lanh trinh nghien hu hoc ) or ( thu ((sach trai) OR (sach tai)) nghiem d hoc ))*.