Perhaps you should try some spelling variations:
giai nghia » giai nghiep, trai nghia
sach truc » sach tren, sach thu, sach thue
cach thuc » anh thuc, cac thu
nghiem ad » nghiem d, nghiem ban, nghiem lam
nghia vu » nghia tu, nghiep vu, nghia duy
tu cuu » tu huu, tu cua, tu chu
vu hoc » tu hoc, va hoc, du hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te ((sach truc) OR (cach thuc)) nghiem ad hoc ) or ( tu cuu giai nghia vu hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te ((sach truc) OR (cach thuc)) nghiem ad hoc ) OR ( tu cuu giai nghia vu hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( te ((sach truc) OR (cach thuc)) nghiem ad hoc ) or ( tu cuu giai nghia vu hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( te ((sach truc) OR (cach thuc)) nghiem ad hoc ) or ( tu cuu giai nghia vu hoc ))*.