Perhaps you should try some spelling variations:
hoach hoi » hoc hoi, hoach ha, sach hoi
phu thong » pho thong, phap thong, khau thong
thuat san » thuat toan, thuat song, thuat lanh
bach khoa » anh khoa
tu hoach » thu hoach, tu hach, quy hoach
tri truc » tri thuc, thi truc, tri thuoc
hoi phu » hoi chu, hai phu, hoa phu
san tri » van tri, quan tri, tran tri
khoa he » hoa he, khoa hoc, khong he
tro tu » troi tu, tao tu, trong tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu cac tro tu hoach hoi phu thong ) or ( thuat san tri truc bach khoa he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cac tro tu hoach hoi phu thong ) OR ( thuat san tri truc bach khoa he thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cac tro tu hoach hoi phu thong ) or ( thuat san tri truc bach khoa he thong ))*.